Stroke limiting anti-strain structure for injection mold

Abstract

The stroke limiting anti-strain structure comprises an upper mold, a lower mold is connected to the lower end of the upper mold in a clamped mode, the upper mold and the lower mold are connected with a protection piece, the protection piece comprises a reset piece and two sets of installation bases arranged on the front side and the rear side of the lower mold, and the reset piece comprises two sets of installation bases arranged on the front side and the rear side of the lower mold. The middle part of the mounting seat is connected with a limiting rod in a sliding manner, and the limiting rod is provided with a side mold core. According to the stroke limiting anti-strain structure for the injection mold, when the inclined rod needs to be replaced, the upper mold and the lower mold are separated, the inclined rod and the side mold core are separated, a second screw is detached, a plurality of groups of positioning pins support the mounting block, the mounting plate, the wear-resistant part, the inclined rod and the sliding block, the inclined rod and the sliding block are dragged by hands, and a traction line is pulled through a traction strip; the pull wire pulls the positioning pin to slide along the inner side of the upper die, the mounting block, the sliding block, the inclined rod and the wear-resistant part are taken away, and the inclined rod is pulled out of the sliding block.

Description

Technical Field

[0001] This utility model relates to the technical field, specifically to a stroke-limiting and anti-tear structure for injection molds. Background Technology

[0002] To reduce the risk of tearing in injection molds during production, a corresponding stroke-limiting anti-tear structure is needed. Referring to the patented designation CN110480957B, a deep-cavity injection mold anti-tear structure and deep-cavity injection mold include a stroke-limiting block and an elastic element. The stroke-limiting block is positioned on the slider, and the elastic element is positioned between the insert and the slider, preventing tearing of the product's side holes and core breakage. However, as described in the aforementioned patent, existing stroke-limiting anti-tear structures for injection molds often struggle to effectively position and support the inclined rod mounting end before and after disassembly. This affects installation and disassembly efficiency, and the mounting end is prone to damage due to loss of support during disassembly, thus impacting the device's lifespan. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a stroke-limiting and anti-pull-damage structure for injection molds, which solves problems such as poor treatment effect at the installation end of the device's inclined rod, affecting the replacement of the inclined rod.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a stroke-limiting and anti-tear structure for injection molds, comprising an upper mold, a lower mold being snapped into place at the lower end of the upper mold, and a protective component for stroke-limiting and anti-tear measures connected to the upper and lower molds, the protective component comprising:

[0005] A reset component is provided on the front and rear sides of the lower mold for resetting and processing the internal components of the mold. The reset component includes two sets of mounting seats installed on the front and rear sides of the lower mold. A limit rod is slidably connected in the middle of the mounting seat. A side core is installed near the inner side of the lower mold on the limit rod. A first spring for resetting the side core is provided near the outer side of the mounting seat near the limit rod.

[0006] A limiting component, installed inside the upper mold, is used for side core resetting and guiding. The limiting component includes mounting blocks installed at both ends of the inner sides of two sets of upper molds. The inner side of the upper mold is provided with an array of positioning pins for positioning the mounting blocks. An array of second screws for fixing the mounting blocks is installed on the upper side of the upper mold. The bottom of each array of second screws is threaded with a slider. The inner side of the slider is inclined and slidably connected to a slidable rod that is slidably connected to the side core. A wear-resistant part that fits against the side core is installed on the side of the slider. An mounting plate that is slidably connected to the positioning pins is provided on the upper side of the slider.

[0007] Preferably, a set of first screws that are threaded to the lower mold are respectively threaded to both sides of the mounting base, and a first stop block that is fixedly connected to the first spring is provided on the side of the limiting rod away from the lower mold. The two sets of side cores are symmetrically slidably connected to both ends of the inner side of the lower mold.

[0008] Preferably, all the positioning pins in the array are slidably connected to the inner side of the upper mold. The limiting component also includes a second spring installed in the upper mold to promote the reset of the positioning pins. A traction line is installed on the positioning pin away from the middle of the upper mold. The upper mold is provided with a slide groove that is slidably connected to the traction line. The side of the mounting block and the middle of the mounting plate are provided with positioning grooves corresponding to the positioning pins.

[0009] Preferably, the traction line is provided with a traction bar near the outer side of the upper mold, the traction line is made of steel wire, and the upper mold is provided with a movable groove corresponding to the second spring side.

[0010] Preferably, the top of the inclined rod is provided with a second stop block that is slidably connected to the bottom of the mounting block, the side core is provided with an inclined groove that is slidably connected to the inclined rod, and the inner side of the lower mold is provided with a storage groove corresponding to the lower end of the inclined rod.

[0011] Preferably, the wear-resistant component includes pads that are respectively attached to the side core and the slider. The pads are equipped with two sets of protrusions that are slidably connected to the inner side of the slider. Two sets of third screws that are threaded to the protrusions are respectively threaded to both sides of the slider.

[0012] Beneficial effects

[0013] This invention provides a stroke-limiting and anti-stretching structure for injection molds. Compared with the prior art, it has the following advantages:

[0014] 1. This stroke-limiting anti-pull-out structure for injection molds uses a limiting component within the device. When the inclined rod needs to be replaced, the upper and lower molds are separated, allowing the inclined rod to separate from the side core. The second screw is removed, and the array of locating pins provides support for the mounting block, mounting plate, wear-resistant parts, inclined rod, and slider. The inclined rod and slider are held by hand and pulled by the traction bar. The traction line pulls the locating pin along the inner side of the upper mold, gradually separating the locating pin from the mounting block and mounting plate and compressing the array of second springs. The mounting block, slider, inclined rod, and wear-resistant parts are then removed, separating the mounting block from the slider. The inclined rod is then pulled out from the slider. This design provides positioning and support for the mounting end on the upper side of the inclined rod, facilitating quick disassembly of the parts and preventing damage during disassembly.

[0015] 2. This anti-stretching structure for the stroke limit of injection molds uses wear-resistant parts inside the device. Before and after injection, the pad and the side core rub repeatedly. After the upper and lower molds are demolded and the limiting parts are partially disassembled, the pad and the protrusion on the slider can be disassembled by separating the third screw from the protrusion and the slider respectively, which makes it easy for users to quickly replace the worn end. Attached Figure Description

[0016] Figure 1 This is a sectional perspective view of the present invention;

[0017] Figure 2 This is a partial enlarged cross-sectional view of the limiting component of this utility model;

[0018] Figure 3 This is an enlarged view of the wear-resistant part of this utility model;

[0019] Figure 4 This is a perspective view of the present invention.

[0020] In the diagram: 1. Upper mold; 2. Lower mold; 3. Reset component; 31. Mounting base; 32. First screw; 33. Limiting rod; 34. First spring; 35. Side core; 4. Limiting component; 41. Mounting block; 42. Second screw; 43. Positioning pin; 44. Second spring; 45. Traction line; 46. Slider; 47. Diagonal rod; 48. Wear-resistant part; 481. Pad; 482. Protrusion; 483. Third screw; 49. Mounting plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figures 1-4 This utility model provides the following two technical solutions:

[0023] The first embodiment: The stroke limiting and anti-straining structure for injection molds includes an upper mold 1, with a lower mold 2 snapped onto the lower end of the upper mold 1. The upper mold 1 and the lower mold 2 are connected to a protective component for stroke limiting and anti-straining of the injection mold. The protective component includes a reset component 3, which is set on the front and rear sides of the lower mold 2 for resetting and processing the internal components of the mold. The reset component 3 includes two sets of mounting seats 31 installed on the front and rear sides of the lower mold 2. A limit rod 33 is slidably connected in the middle of the mounting seat 31. A side core 35 is installed on the limit rod 33 near the inner side of the lower mold 2. A first spring 34 for resetting the side core 35 is provided on the outer side of the mounting seat 31 near the limit rod 33.

[0024] Limiting component 4 is installed inside the upper mold 1 for resetting and guiding the side core 35. The limiting component 4 includes mounting blocks 41 installed at both ends of the inner side of the two sets of upper mold 1. The inner side of the upper mold 1 is provided with an array of positioning pins 43 for positioning the mounting blocks 41. The upper side of the upper mold 1 is provided with a second screw 42 for fixing the mounting blocks 41. The bottom of the array of second screws 42 is threaded with a slider 46. The inner side of the slider 46 is inclined and slidably connected to the inclined rod 47 that is slidably connected to the side core 35. The side of the slider 46 is provided with a wear-resistant part 48 that fits against the side core 35. The upper side of the slider 46 is provided with a mounting plate 49 that is slidably connected to the positioning pins 43.

[0025] The mounting base 31 has a set of first screws 32 threaded to the lower mold 2 on both sides. The limiting rod 33 has a first stop block fixedly connected to the first spring 34 on the side away from the lower mold 2. Two sets of side cores 35 are symmetrically slidably connected to the two ends of the inner side of the lower mold 2. A set of positioning pins 43 are all slidably connected to the inner side of the upper mold 1. The limiting component 4 also includes a second spring 44 installed in the upper mold 1 to promote the reset of the positioning pins 43. A traction line 45 is installed on the positioning pin 43 away from the middle of the upper mold 1. The upper mold 1 has a slide groove that is slidably connected to the traction line 45. The side of the mounting block 41 and the middle of the mounting plate 49 have positioning grooves corresponding to the positioning pins 43.

[0026] The array traction line 45 has a traction bar near the outer side of the upper mold 1. The traction line 45 is made of steel wire. The upper mold 1 has a movable groove corresponding to the side of the second spring 44. The top of the inclined rod 47 has a second stop block that slides with the bottom of the mounting block 41. The side core 35 has an inclined groove that slides with the inclined rod 47. The lower mold 2 has a storage groove corresponding to the lower end of the inclined rod 47. Before and after injection molding, the inclined rod 47 and the side core 35 rub against each other repeatedly. When the inclined rod 47 needs to be replaced, the upper mold 1 and the lower mold 2 are separated to separate the inclined rod 47 from the side core 35. The second screw 42 is then removed to position the array. Pin 43 provides support for mounting block 41, mounting plate 49, wear-resistant part 48, diagonal rod 47, and slider 46. Hold diagonal rod 47 and slider 46 by hand, and pull traction line 45 through traction bar. Traction line 45 pulls positioning pin 43 to slide along the inner side of upper mold 1. Positioning pin 43 gradually separates from mounting block 41 and mounting plate 49 and compresses array of second springs 44. Remove mounting block 41, slider 46, diagonal rod 47, and wear-resistant part 48, separate mounting block 41 from slider 46, and pull diagonal rod 47 out from slider 46. The second stop on the upper side of diagonal rod 47 plays a role in preventing detachment.

[0027] The main difference between the second implementation method and the first implementation method is that:

[0028] The wear-resistant part 48 includes a pad 481 that is respectively attached to the side core 35 and the slider 46. The pad 481 is equipped with two sets of protrusions 482 that are slidably connected to the inner side of the slider 46. Two sets of third screws 483 that are threaded to the protrusions 482 are respectively threaded to both sides of the slider 46. Before and after injection molding, the pad 481 and the side core 35 are repeatedly rubbed. After the upper mold 1 and the lower mold 2 are demolded and the limiting part 4 is partially disassembled, the pad 481 and the protrusions 482 on the slider 46 are disassembled by separating the third screws 483 from the protrusions 482 and the slider 46 respectively.

[0029] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used.

[0030] During use, during the demolding process of the upper mold 1 and the lower mold 2, the upper mold 1 drives the limiting member 4 to move upward. The inclined rod 47 inside the limiting member 4 drives the side core 35 to separate from the side of the injection molded part, which plays a role in preventing tearing. During the separation of the side core 35 from the injection molded part, the first spring 34 pushes the limiting rod 33 and the side core 35 to move. The side core 35 slides along the inner side of the lower mold 2 and the limiting rod 33 and finally fits against the mounting base 31, which limits the stroke of the side core 35. The pad 481 slides along the inclined surface of the side core 35. Before and after injection, the pad 481, the inclined rod 47 and the side core 35 rub repeatedly. When the pad 481 and the inclined rod 47 need to be replaced, the upper mold 1 and the lower mold 2 are separated, and the inclined rod 47 is separated from the side core 35. The second screw 42 is removed so that the second screw 42 is separated from the upper mold 1, the mounting block 41 and the slider 46.

[0031] At this time, the array positioning pin 43 provides support for the mounting block 41, mounting plate 49, wear-resistant part 48, inclined rod 47, and slider 46. Hold the inclined rod 47 and slider 46 by hand, and pull the traction line 45 through the traction bar. The traction line 45 pulls the positioning pin 43 to slide along the inner side of the upper mold 1. The positioning pin 43 gradually separates from the mounting block 41 and mounting plate 49 and compresses the array second spring 44. Remove the mounting block 41, slider 46, inclined rod 47, and wear-resistant part 48, separate the mounting block 41 and slider 46, pull out the inclined rod 47 from the slider 46, and replace the pad 481 and protrusion 482 by removing the third screw 483 from the side of the slider 46.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stroke-limiting and anti-strain structure for injection molds, comprising an upper mold (1), characterized in that: The lower end of the upper mold (1) is engaged with the lower mold (2). The upper mold (1) and the lower mold (2) are connected to a protective component for limiting the stroke of the injection mold and preventing damage from pulling. The protective component includes: The reset component (3) is set on the front and rear sides of the lower mold (2) for resetting and processing the inner components of the mold. The reset component (3) includes two sets of mounting seats (31) installed on the front and rear sides of the lower mold (2). A limit rod (33) is slidably connected in the middle of the mounting seat (31). A side core (35) is installed near the inner side of the lower mold (2) near the outer side of the mounting seat (31). A first spring (34) for resetting the side core (35) is provided near the outer side of the limit rod (33). A limiting component (4) is installed inside the upper mold (1) for resetting and guiding the side core (35). The limiting component (4) includes mounting blocks (41) installed at both ends of the inner side of the two sets of upper molds (1). The inner side of the upper mold (1) is provided with an array of positioning pins (43) for positioning the mounting blocks (41). The upper side of the upper mold (1) is provided with a second screw (42) for fixing the mounting blocks (41). The bottom of the array of second screws (42) is threaded with a slider (46). The inner side of the slider (46) is inclined and slidably connected to the inclined rod (47) which is slidably connected to the side core (35). The side of the slider (46) is provided with a wear-resistant part (48) that fits against the side core (35). The upper side of the slider (46) is provided with a mounting plate (49) which is slidably connected to the positioning pin (43).

2. The stroke-limiting and anti-tear structure for injection molds according to claim 1, characterized in that: The mounting base (31) has a set of first screws (32) threaded to the lower mold (2) on both sides. The limiting rod (33) is provided with a first stop block fixedly connected to the first spring (34) on the side away from the lower mold (2). The two sets of side cores (35) are symmetrically slidably connected to the two ends of the inner side of the lower mold (2).

3. The stroke-limiting and anti-tear structure for injection molds according to claim 1, characterized in that: The positioning pins (43) of the array are all slidably connected to the inner side of the upper mold (1). The limiting member (4) also includes a second spring (44) installed in the upper mold (1) to promote the reset of the positioning pins (43). The positioning pins (43) are equipped with a traction line (45) away from the middle of the upper mold (1). The upper mold (1) is provided with a sliding groove that is slidably connected to the traction line (45). The side of the mounting block (41) and the middle of the mounting plate (49) are provided with positioning grooves corresponding to the positioning pins (43).

4. The stroke-limiting and anti-tear structure for injection molds according to claim 3, characterized in that: The traction line (45) of the array is provided with a traction bar near the outer side of the upper mold (1). The traction line (45) is made of steel wire. The upper mold (1) is provided with a movable groove on the side corresponding to the second spring (44).

5. The stroke-limiting and anti-tear structure for injection molds according to claim 1, characterized in that: The top of the inclined rod (47) is provided with a second stop block that is slidably connected to the bottom of the mounting block (41). The side core (35) is provided with an inclined groove that is slidably connected to the inclined rod (47). The inner side of the lower mold (2) is provided with a storage groove corresponding to the lower end of the inclined rod (47).

6. The stroke-limiting and anti-tear structure for injection molds according to claim 1, characterized in that: The wear-resistant part (48) includes a pad (481) that is in contact with the side core (35) and the slider (46) respectively. The pad (481) is equipped with two sets of protrusions (482) that are slidably connected to the inside of the slider (46). The slider (46) is threaded with two sets of third screws (483) that are threaded to the protrusions (482) on both sides respectively.

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