Synchronous side-pulling injection mold for 45-degree tee joint

Abstract

The utility model discloses a synchronous side-pulling injection mold for a 45-degree tee joint, which relates to the technical field of injection molding production of the 45-degree tee joint and comprises a fixed injection mold, a movable injection mold, a linear side-pulling demolding part and a rotary side-pulling demolding part, through the design of combining the linear side pulling part and the rotary side pulling part, synchronous pulling of the mold core is realized, product deformation and scratch caused by unbalanced demolding are effectively avoided, and the qualified rate of products is remarkably improved; due to the arrangement of the mold core water paths in the three sliding block mold cores, heat can be quickly taken away, and the cooling time is shortened, so that the production cycle is controlled within 55 seconds, and the production efficiency is greatly improved; the injection mold effectively solves the problems of difficult demolding, low cooling efficiency, difficult precision keeping, low production efficiency and the like when a traditional injection mold is used for producing 45-degree three-way pipe fittings, and has remarkable economic and social benefits and wide application prospects.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology for 45-degree tee fittings, specifically an injection mold for synchronous side-pulling of 45-degree tee fittings. Background Technology

[0002] In the production of plastic products, injection molds are key equipment for achieving efficient and high-quality molding. This is especially true for complex-shaped pipe fittings, such as... Figure 10 The illustration shows a 45-degree tee fitting made of plastic, with inner annular holes at three ends for sealing welding. The production of such fittings requires not only precise mold forming but also a smooth demolding process and product integrity. Traditional injection molds often encounter the following problems when handling such complex structures: 1. Demolding difficulties: The special structure of the 45-degree tee fitting makes it prone to jamming during demolding, especially in the core area. Traditional demolding methods struggle to achieve simultaneous extraction, leading to product deformation or scratches; 2. Low cooling efficiency: Core cooling is crucial for ensuring product precision and sealing. Traditional mold cooling water circuit designs are often inadequate, resulting in long cooling times and difficulty in shortening production cycles; 3. Difficulty maintaining mold precision: Injection pressure can cause displacement between the moving and fixed molds, affecting product precision and quality; 4. Low production efficiency: Traditional mold designs often cannot meet the demands of rapid production, resulting in long production cycles and difficulty adapting to the high-efficiency production requirements of modern industry. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold for synchronous side-pulling of a 45-degree tee, so as to solve the problems mentioned in the background art of traditional injection molds in the production of 45-degree tee fittings, such as difficulty in demolding, low cooling efficiency, difficulty in maintaining mold precision, and low production efficiency.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for synchronous side-pulling of a 45-degree tee, comprising a fixed injection mold and a moving injection mold, as well as a straight side-pulling demolding part disposed at the midpoint of one long side between the two molds and a rotating side-pulling demolding part disposed at the midpoint of the other long side; the fixed injection mold includes an I-beam panel and a fixed template below it, the bottom surface of the fixed template is provided with an upwardly recessed groove and a fixed mold insert is embedded therein, the bottom surface of the fixed mold insert is provided with an upwardly recessed groove. The 45-degree tee fitting groove; the injection mold includes an I-beam base plate and base plate protrusions fixed to the top surface near the two long sides. A moving template is provided on the top surface of the two base plate protrusions. A recessed groove is provided on the top surface of the moving template and a moving mold insert is embedded therein. A recessed 45-degree tee fitting groove is provided on the top surface of the moving mold insert. A straight-side ejection part is provided at the middle of one long side of the fixed template and the moving template, and a rotating-side ejection part is provided at the middle of the other long side.

[0005] Preferably, a positioning ring is provided at the center of the top surface of the I-beam panel, and a sprue channel is provided at the center of the ring, which sequentially passes through the I-beam panel, the fixed template, and the fixed template insert, and a sprue sleeve is provided around the sprue channel.

[0006] Preferably, an upper face pin plate and a lower bottom pin plate are provided between the two bottom plate protrusions, and the face pin plate is provided with a plurality of demolding ejector pins.

[0007] Preferably, the linear side-pull demolding part includes a linear guide slide horizontally arranged on the top surface of the moving template and a linear side-pull slider that slides along its axial direction. The inner side of the linear side-pull slider is provided with a slider core, and the lower end of the outer side is connected to a horizontally arranged linear side-pull cylinder through a connector. The linear side-pull cylinder is arranged on the outer side of the moving template through a cylinder bracket.

[0008] Preferably, the rotary side-pulling demolding part includes an inclined guide slide horizontally arranged on the top surface of the moving template and an inclined side-pulling slider that slides along its axial direction. The inner side of the inclined side-pulling slider is provided with a slider core, and the lower end of the outer side is connected to a slider rack. The slider rack is meshed with a rotating gear, and the rotating shaft of the rotating gear is installed and fixed by a gear frame arranged on the outer side of the moving template. The two rotating gears are provided with gear teeth on their adjacent sides and are meshed with a synchronous rack. The outer end of the synchronous rack is connected to a horizontally arranged rotary cylinder through a connector. The rotary cylinder is arranged on the outer side of the moving template through a rotary cylinder bracket.

[0009] Preferably, the outer surfaces of the linear side slide block and the two oblique side slide blocks are provided with inclined surfaces, and a fixing wedge is provided on the bottom surface of the fixed template at the corresponding positions of the linear side slide block and the two oblique side slide blocks. The fixing wedge is provided with an inclined surface that matches the inclined surfaces of the linear side slide block and the two oblique side slide blocks.

[0010] Preferably, the I-beam base plate is provided with a plurality of ejector through holes, and an ejector pad fixed to the base pin plate is provided in each ejector through hole.

[0011] Preferably, a return rod is provided at each of the four corners of the needle plate, and a return spring is sleeved on the outside of the return rod and placed between the needle plate and the moving template. A guide sleeve is provided at each of the four corners of the fixed template, and a guide rod that can be inserted into the guide sleeve is provided at each of the four corners of the moving template.

[0012] Preferably, a precision positioning protrusion is provided on the bottom surface of the fixed template near the middle of its two short sides, and a precision positioning groove is provided on the top surface of the moving template to engage with the precision positioning protrusion.

[0013] Preferably, the fixed mold insert and the moving mold insert are respectively provided with a fixed mold water channel and a moving mold water channel near the groove of the 45-degree tee fitting. The fixed mold water channel is provided with a water channel interface on the side of the fixed mold plate. The moving mold water channel is provided with a water channel interface on the side of the moving mold plate. The straight side pull slider and the slider core and the oblique side pull slider and the slider core are respectively provided with core water channels. The core water channels are respectively provided with water channel interfaces on the outer surfaces of the straight side pull slider and the oblique side pull slider.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By adopting a design that combines linear side-pulling and rotary side-pulling demolding parts, and especially by utilizing a two-slider synchronous extraction structure with cylinder and gear rack cooperation, the core is extracted synchronously, which effectively avoids product deformation and scratches caused by uneven demolding and significantly improves the product qualification rate.

[0016] 2. The water channels in the three slider cores can quickly remove heat and shorten the cooling time, thereby controlling the production cycle to within 55 seconds and greatly improving production efficiency.

[0017] 3. By setting a precision positioning structure in the vertical direction of the slider movement, the relative positional displacement between the moving and fixed molds caused by injection pressure is effectively eliminated, ensuring the high precision of the mold, thereby guaranteeing the precision and sealing performance of the product, especially the sealing performance of the conical hole connection part.

[0018] 4. The use of this utility model effectively solves the problems of difficult demolding, low cooling efficiency, difficulty in maintaining precision and low production efficiency that exist in traditional injection molds when producing 45-degree tee fittings. It has significant economic and social benefits and broad application prospects. Attached Figure Description

[0019] Figure 1 This is an isometric drawing of the present invention;

[0020] Figure 2 This is a top view of the present invention;

[0021] Figure 3 for Figure 2 Sectional view of AA;

[0022] Figure 4 for Figure 2 Sectional view of BB;

[0023] Figure 5 Top views of the straight-side ejection section and the rotating-side ejection section;

[0024] Figure 6 This is a schematic diagram showing the initial state of the linear side ejection section and the rotary side ejection section;

[0025] Figure 7 This is a schematic diagram showing the intermediate state of the straight-side demolding section and the rotary-side demolding section.

[0026] Figure 8 A schematic diagram showing the fully extracted state of the straight-side ejection section and the rotary-side ejection section;

[0027] Figure 9 This is a schematic diagram of the core water channel;

[0028] Figure 10 This is a product illustration;

[0029] In the diagram: Injection mold fixed mold-1, I-beam face plate-101, fixed mold plate-102, fixed mold insert-103, locating ring-104, sprue runner-105, sprue bushing-106, guide bushing-107, precision positioning bump-108, fixed mold water channel-109, injection mold moving mold-2, I-beam base plate-201, base plate bump-202, moving mold plate-203, moving mold insert-204, face pin plate-205, bottom pin plate-206, ejector pin-207, ejector through hole-208, ejector pad-209, return rod-210, return spring-211, guide rod-212 Precision positioning groove-213, moving mold channel-214, straight side pull demolding part-3, straight guide slide-301, straight side pull slider-302, slider core-303, connector-304, straight side pull cylinder-305, cylinder bracket-306, fixed wedge-307, core channel-308, rotating side pull demolding part-4, inclined guide slide-401, inclined side pull slider-402, slider rack-403, rotating gear-404, gear frame-405, synchronous rack-406, rotating cylinder-407, rotating cylinder bracket-408. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Please refer to Figure 1-10 , Figure 1 This is an isometric drawing of the present invention; Figure 2 This is a top view of the present invention; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 2 Sectional view of BB; Figure 5 Top views of the straight-side ejection section and the rotating-side ejection section; Figure 6 This is a schematic diagram showing the initial state of the linear side ejection section and the rotary side ejection section; Figure 7 This is a schematic diagram showing the intermediate state of the straight-side demolding section and the rotary-side demolding section. Figure 8 A schematic diagram showing the fully extracted state of the straight-side ejection section and the rotary-side ejection section; Figure 9 This is a schematic diagram of the core water channel; Figure 10 This is a product illustration.

[0032] This utility model provides an injection mold for synchronous side-pulling of a 45-degree tee, including a fixed injection mold 1 and a moving injection mold 2, and a straight side-pulling demolding part 3 is provided at the middle of one long side between the fixed injection mold 1 and the moving injection mold 2, and a rotating side-pulling demolding part 4 is provided at the middle of the other long side.

[0033] The injection molding fixed mold 1 includes an I-beam panel 101 connected to the injection molding machine fixed plate. A fixed template 102 is provided below the I-beam panel 101. A recessed groove is provided on the bottom surface of the fixed template 102, and a fixed mold insert 103 is embedded therein. A recessed 45-degree tee fitting groove is provided on the bottom surface of the fixed mold insert 103. A positioning ring 104 is provided at the center of the top surface of the I-beam panel 101. A sprue runner 105 is provided at the center of the positioning ring 104, which passes through the I-beam panel 101, the fixed template 102, and the fixed mold insert 103 in sequence. A sprue sleeve 106 is provided around the sprue runner 105.

[0034] The injection molding moving mold 2 includes an I-beam base plate 201 connected to the movable plate of the injection molding machine. Base plate protrusions 202 are fixedly connected to the top surface of the I-beam base plate 201 near the two long sides. Moving mold plate 203 is provided on the top surface of the two base plate protrusions 202. Moving mold plate 203 has a recessed groove on the top surface of the moving mold plate 203 and a moving mold insert 204 is embedded therein. Moving mold insert 204 has a recessed 45-degree tee fitting groove on the top surface of the moving mold insert 204. An upper face pin plate 205 and a lower bottom pin plate 206 are provided between the two base plate protrusions 202. Multiple ejector pins 207 are provided on the face pin plate 205.

[0035] A straight-line side demolding part 3 is provided at the middle of one long side of the fixed template 102 and the moving template 203, and a rotating side demolding part 4 is provided at the middle of the other long side.

[0036] The linear side-pulling demolding part 3 includes a linear guide slide 301 horizontally arranged on the top surface of the moving template 203. A linear side-pulling slider 302 that can move along its axial direction is provided through the linear guide slide 301. A slider core 303 is provided on the inner side of the linear side-pulling slider 302, and a horizontally arranged linear side-pulling cylinder 305 is connected to the lower end of the outer side through a connector 304. The linear side-pulling cylinder 305 is arranged on the outer side of the moving template 203 through a cylinder bracket 306.

[0037] The rotating side-pulling demolding part 4 includes an inclined guide slide 401 horizontally arranged on the top surface of the moving template 203. An inclined side-pulling slider 402 that can move along its axial direction is provided through the inclined guide slide 401. A slider core 303 is provided on the inner side of the inclined side-pulling slider 402, and a slider rack 403 is connected to the lower end of the outer side. The slider rack 403 is meshed with a rotating gear 404. The rotating shaft of the rotating gear 404 is installed and fixed by a gear frame 405 arranged on the outer side of the moving template 203. The two rotating gears 404 are provided with gear teeth on the side close to each other and are meshed with a synchronous rack 406. The outer end of the synchronous rack 406 is connected to a horizontally arranged rotating cylinder 407 through a connector 304. The rotating cylinder 407 is arranged on the outer side of the moving template 203 through a rotating cylinder bracket 408.

[0038] The outer surfaces of the linear side slide block 302 and the two inclined side slide blocks 402 are all provided with inclined surfaces. On the bottom surface of the fixed template 102, a fixing wedge 307 is provided at the corresponding position of the linear side slide block 302 and the two inclined side slide blocks 402. The fixing wedge 307 is provided with an inclined surface that matches the inclined surface of the linear side slide block 302 and the two inclined side slide blocks 402.

[0039] The I-beam base plate 201 is provided with a plurality of ejection through holes 208, and an ejection pad 209 fixedly connected to the bottom pin plate 206 is provided in each ejection through hole 208. The ejection mechanism of the injection can perform demolding operation by pushing the ejection pad 209.

[0040] The face pin plate 205 is provided with return rods 210 at its four corners, and a return spring 211 is sleeved on the outside of the return rods 210 and placed between the face pin plate 205 and the moving template 203 for resetting the face pin plate 205 after ejection. The fixed template 102 is provided with a guide sleeve 107 at its four corners, and the moving template 203 is provided with a guide rod 212 at its four corners that can be inserted into the guide sleeve 107. The fixed template 102 is provided with a precision positioning protrusion 108 near the middle of its two short sides on its bottom surface, and the moving template 203 is provided with a precision positioning groove 213 that engages with the precision positioning protrusion 108 on its top surface. Through the coordinated use of the precision positioning protrusion 108 and the precision positioning groove 213, the accuracy of the injection mold 1 and the injection mold 2 during mold closing is ensured.

[0041] The fixed mold insert 103 and the moving mold insert 204 are respectively provided with a fixed mold water channel 109 and a moving mold water channel 214 near the groove of the 45-degree tee fitting. The fixed mold water channel 109 is provided with a water channel interface on the side of the fixed mold plate 102. The moving mold water channel 214 is provided with a water channel interface on the side of the moving mold plate 203. The straight side pull slider 302 and the slider core 303 and the oblique side pull slider 402 and the slider core 303 are respectively provided with core water channels 308. The core water channels 308 are respectively provided with water channel interfaces on the outer surfaces of the straight side pull slider 302 and the oblique side pull slider 402.

[0042] When using it, the following steps are included:

[0043] 1. Before mold opening, the injection mold 1 and injection moving mold 2 are pressed together by the mold closing structure of the injection machine, and the inclined surfaces behind the three sliders are contacted and wedged by the fixed wedges 307 to resist the injection pressure acting on the slider core 303.

[0044] 2. During mold opening, the fixed injection mold 1 and the moving injection mold 2 separate from the parting surface. The three fixed wedges 307 fixed to the fixed mold plate 102 move together, and the slider is no longer wedged. After the mold is in place, under the control of the injection molding machine's control system, the solenoid valve of the linear side-pulling cylinder 305 is controlled to perform a corresponding action, sending high-pressure compressed air into the retraction air inlet of the linear side-pulling cylinder 305, causing the cylinder piston to retract. On the one hand, this drives the linear side-pulling slider 302 and the slider core 303 to be pulled out. On the other hand, the double 45-degree side cylinder and gear... The rack and pinion synchronously drive the inclined side slide block 402 and slide block core 303 to pull out, thereby removing the product from the slide block core; then, under the control of the injection molding machine's control system, the ejection mechanism on the moving mold side of the injection molding machine is activated, the ejector bar presses against the ejection pad 209, pushes the bottom pin plate 206 and the top pin plate 205, and overcomes the clamping force of the return spring 211 to drive the upper demolding ejector pin 207 and the return rod 210. As the ejection continues and reaches a suitable height, the product is completely separated from the moving mold, the ejection is completed, and the product falls off.

[0045] The injection molding machine's control system issues another command, causing the ejector mechanism to retract and reset. The bottom pin plate 206, top pin plate 205, and the ejector pins 207 and return rod 210 on them also reset under the force of the return spring 211. Next, under the control of the injection molding machine's control system, the solenoid valve of the control cylinder performs a corresponding action, sending high-pressure compressed air into the cylinder's extension inlet, causing the cylinder piston to extend. The linear side-pull cylinder 305 drives the linear side-pull slider 302 and slider core 303 forward. The rotary cylinder 407 drives the oblique side-pull slider 402 and slider core 303 forward, resetting the sliders. After the sliders reset, under the control of the injection molding machine's control system, the mold closes again. The fixed wedge 307 tightens normally, the parting surface closes again, and a command is issued for the injection molding machine to begin injecting molten plastic into the runner and cavity. The next work cycle begins.

[0046] Although embodiments of the present invention have been shown and described, it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, it will be understood by those skilled in the art that all other embodiments obtained by making various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention and without creative effort are within the scope of protection of the present invention.

Claims

1. A synchronous side draw injection mold for a forty-five degree tee, characterized by: The system includes a fixed injection mold (1) and a moving injection mold (2), as well as a straight-side ejector section (3) located at the midpoint of one long side between the two molds and a rotating-side ejector section (4) located at the midpoint of the other long side; the fixed injection mold (1) includes an I-beam panel (101) and a fixed template (102) below it, the bottom surface of the fixed template (102) is provided with an upwardly recessed groove and a fixed mold insert (103) is embedded therein, the bottom surface of the fixed mold insert (103) is provided with an upwardly recessed 45-degree tee fitting groove; the moving injection mold (2) includes an I-beam base plate ( 201) and the bottom plate protrusions (202) fixed on the top surface near the two long sides. The top surface of the two bottom plate protrusions (202) is provided with a moving template (203). The top surface of the moving template (203) is provided with a recessed groove and a moving mold insert (204) is embedded therein. The top surface of the moving mold insert (204) is provided with a recessed 45-degree tee fitting groove. The fixed template (102) and the moving template (203) are provided with a straight side demolding part (3) at the middle of one long side and a rotating side demolding part (4) at the middle of the other long side.

2. The injection mold for a forty-five degree tee with simultaneous side draft of claim 1, wherein: A positioning ring (104) is provided at the center of the top surface of the I-beam panel (101), and a sprue runner (105) is provided at the center of the I-beam panel (101), the fixed template (102), and the fixed template insert (103) in sequence. A sprue sleeve (106) is provided around the sprue runner (105).

3. The injection mold for a forty-five degree tee with synchronized side pulls of claim 2, wherein: An upper face pin plate (205) and a lower bottom pin plate (206) are provided between the two bottom plate protrusions (202), and a plurality of demolding ejector pins (207) are provided on the face pin plate (205).

4. The injection mold for a forty-five degree tee with synchronized side pulls of claim 3, wherein: The linear side-pull demolding part (3) includes a linear guide slide (301) horizontally arranged on the top surface of the moving template (203) and a linear side-pull slider (302) that slides along its axial direction. A slider core (303) is provided on the inner side of the linear side-pull slider (302), and a horizontally arranged linear side-pull cylinder (305) is connected to the lower end of the outer side through a connector (304). The linear side-pull cylinder (305) is arranged on the outer side of the moving template (203) through a cylinder bracket (306).

5. The injection mold for a forty-five degree tee with synchronized side pulls of claim 4, wherein: The rotating side-pulling demolding part (4) includes a horizontally arranged inclined guide slide (401) on the top surface of the moving template (203) and an inclined side-pulling slide block (402) that slides along its axial direction. The inner side of the inclined side-pulling slide block (402) is provided with a slide block core (303), and the lower end of the outer side is connected to a slide block rack (403). The slide block rack (403) is meshed with a rotating gear (404). The rotating shaft of the rotating gear (404) is fixed by a gear frame (405) arranged on the outer side of the moving template (203). The two rotating gears (404) are provided with gear teeth on the side that is close to each other and are meshed with a synchronous rack (406). The outer end of the synchronous rack (406) is connected to a horizontally arranged rotating cylinder (407) through a connector (304). The rotating cylinder (407) is arranged on the outer side of the moving template (203) through a rotating cylinder bracket (408).

6. The injection mold for a forty-five degree tee with synchronized side pulls of claim 5, wherein: The outer surfaces of the linear side slide block (302) and the two inclined side slide blocks (402) are all provided with inclined surfaces. On the bottom surface of the fixed template (102), a fixed wedge block (307) is provided at the corresponding position of the linear side slide block (302) and the two inclined side slide blocks (402). The fixed wedge block (307) is provided with an inclined surface that matches the inclined surface of the linear side slide block (302) and the two inclined side slide blocks (402).

7. The injection mold for a forty-five degree tee with synchronized side pulls of claim 6, wherein: The I-shaped base plate (201) is provided with a plurality of ejection through holes (208), and an ejection pad (209) fixedly connected to the bottom pin plate (206) is provided in each ejection through hole (208).

8. The injection mold for a forty-five degree tee with synchronized side pulls of claim 7, wherein: The needle plate (205) is provided with return rods (210) at its four corners, and a return spring (211) is sleeved on the outside of the return rods (210) and placed between the needle plate (205) and the moving template (203). The fixed template (102) is provided with a guide sleeve (107) at its four corners, and the moving template (203) is provided with a guide rod (212) at its four corners that can be inserted into the guide sleeve (107).

9. The injection mold for a forty-five degree tee with synchronized side pulls of claim 8, wherein: The fixed template (102) has a precision positioning protrusion (108) on its bottom surface near the middle of its two short sides, and the moving template (203) has a precision positioning groove (213) on its top surface that engages with the precision positioning protrusion (108).

10. The injection mold for a forty-five degree tee with synchronized side pulls of claim 9, wherein: The fixed mold insert (103) and the moving mold insert (204) are respectively provided with a fixed mold water channel (109) and a moving mold water channel (214) near the groove of the 45-degree tee fitting. The fixed mold water channel (109) has a water channel interface on the side of the fixed mold plate (102). The moving mold water channel (214) has a water channel interface on the side of the moving mold plate (203). The straight side sliding block (302) and the sliding block core (303) and the oblique side sliding block (402) and the sliding block core (303) are respectively provided with a core water channel (308). The core water channel (308) has a water channel interface on the outer surface of the straight side sliding block (302) and the oblique side sliding block (402).

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