Injection mold for hollow part
By designing an injection mold for hollow parts and using the combined structure of core-pulling and inserts, the problem of difficult molding and demoulding of existing molds is solved, and efficient molding and demoulding of hollow parts is achieved.
Patent Information
- Application Number
- CN202421225832.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Existing molds are difficult to effectively mold hollow parts, especially those parts with circular openings on the upper side, square openings on the lower side, and inner walls are embedded in the inner wall. Common insert line positions or oblique ejection release methods are difficult to achieve molding. Removal of inserts on the inner side wall of the part.
Design an injection molding mold for hollow parts, including the upper template and the lower template, the lower template is equipped with a lower mold kernel, the bottom mold is set with a core, the core penetrates the lower mold and the lower template, and the four first lines are combined with the four first lines. The positioning mechanism and four diagonal institutions, through the driver of the top stick and the thimble board, realize the lifting and movement of the core and the inlaid, ensure that the inlaid inner wall inner wall of the part can be successfully molded and demolished.
The effective molding and release of hollow parts can be achieved, ensuring that the complex structures of the inner wall of the parts and the outer wall of the parts can smoothly form and leave the mold, which improves production efficiency.
Smart Images
Figure CN222387523U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of molds, and in particular to an injection mold for hollow parts. Background Art
[0002] A mold is a tool used to make molded objects. The mold generally consists of a movable mold (upper mold) and a fixed mold (lower mold). The two parts can be separated or combined. When separated, the workpiece is taken out, and when combined, the blank is injected into the mold cavity for forming. For some parts with irregular structures, it is generally necessary to use inserts in the mold to cooperate with the molding. However, for some hollow parts, for example, a circular opening is opened on the upper side of the part, a square opening is opened on the lower side of the part, and the inner wall of the part is recessed, it is difficult to demold the inserts on the inner wall of the molded part using the common insert sliding or oblique elastic demolding methods. Utility Model Content
[0003] The purpose of the present application is to provide an injection mold for hollow parts, which can be used to mold hollow parts.
[0004] In order to achieve the above objectives, the technical solution adopted by the utility model is: an injection mold for hollow parts, comprising an upper template and a lower template, the lower template is embedded with a lower mold core, a core pull is arranged in the lower mold core, the core pull passes through the lower mold core and the lower template, and a push rod and a push pin plate for lifting are arranged on the side of the lower template away from the upper template, the push rod is connected with the core pull and is used to drive the core pull to lift and lower, four first sliding mechanisms and four inclined ejector mechanisms are arranged around the core pull, the first sliding mechanism is installed on the lower template, each of the first sliding mechanisms includes a first insert for molding parts, the inclined ejector mechanism is installed on the ejector plate, the inclined ejector mechanism includes a second insert for molding parts, four first inserts and four second inserts are arranged around the core pull in an interval manner, and the four first inserts, four second inserts and the core pull are assembled to cooperate with the inner side wall of the lower mold core to mold the part.
[0005] By adopting the above technical scheme, the four first inserts, the four second inserts and the core puller are assembled to fit with the inner wall of the part, thereby forming a hollow part. During demolding, the ejector rod drives the core puller to move downward, and then the first slide mechanism drives the first insert to move inward, so that the first insert is separated from the inner wall of the formed part. Finally, the ejector plate drives the inclined ejector mechanism to move the second insert inward, thereby separating from the inner wall of the formed part.
[0006] Preferably, the first insert is horizontally slidably installed on the lower template, and a slope inclined from top to bottom outward is provided on a side of the first insert facing the core pulling, and a T-shaped groove is provided on a side of the first insert facing the core pulling, and a T-shaped block matching the T-shaped groove is correspondingly provided on the core pulling, and the T-shaped block is placed in the T-shaped groove.
[0007] By adopting the above scheme, the arrangement of the T-shaped block and the T-shaped groove enables the first insert to be installed on the core pulling in an inclined manner, and at the same time, the first insert is installed on the lower template in a horizontal sliding manner, so that when the core pulling moves downward, the first insert moves toward the core pulling, so that the outer side of the first insert is separated from the inner wall of the formed part.
[0008] Preferably, the inclined ejector mechanism also includes an inclined ejector seat and an inclined ejector guide block, the inclined ejector seat is fixedly mounted on the ejector plate, the inclined ejector guide block is fixedly mounted on the lower template, a sliding groove parallel to the ejector plate is provided on the inclined ejector seat, the lower end of the second insert passes through the inclined ejector guide block and is installed in the sliding groove and slides in the sliding groove, the direction of the sliding groove forms an angle of 45° with the edge of the ejector plate, and the inclination direction of the second insert is the same as the direction of the sliding groove.
[0009] By adopting the above technical solution, during demoulding, the ejector plate drives the inclined ejector seat to move upward. Due to the limitation of the inclined ejector guide block and the cooperation of the sliding groove, the second insert moves along its own direction, thereby separating the second insert from the inner wall of the molded part.
[0010] Preferably, three second sliding mechanisms are also provided on the lower mold core, the second sliding mechanisms include a third insert and a sliding seat, the sliding seat is embedded and installed on the lower mold plate, one end of the third insert is used to cooperate with the outer wall of the formed part, the other end of the third insert is horizontally slidably installed on the sliding seat, and a fixed plug rod is also provided on the sliding seat, a first socket is penetrated through the third insert, a second socket aligned with the first socket is provided on the sliding seat, and the fixed plug rod is used to be inserted into the first socket and the second socket.
[0011] By adopting the above scheme, the three second sliding mechanisms are respectively used to form the outer wall of the hollow part, so that the buckles, recesses, buckles, etc. on the outer wall of the hollow part can be smoothly formed, and when demolding, after removing the fixed insert, the third insert moves away from the molded part along the sliding seat, thereby realizing the demolding of the third insert.
[0012] Preferably, the number of the lower mold cores is two, the two lower mold cores are arranged symmetrically, and each lower mold core corresponds to a group of the first sliding mechanism, a group of the inclined lift mechanism and a group of the second sliding mechanism.
[0013] By adopting the above solution, two hollow parts can be formed at the same time, thereby improving the production efficiency of the hollow parts.
[0014] Preferably, a first protrusion is provided on the top surface of the core pulling, and a second protrusion and a third protrusion are respectively provided on the top surfaces of the first insert and the second insert, and the first protrusion, the second protrusion and the third protrusion are combined to form a truncated cone, and a molding disk is provided on the top surface of the core pulling, and the molding disk is sleeved on the first protrusion, the second protrusion and the third protrusion, and the top surface of the molding disk is used to abut against the upper template during molding.
[0015] By adopting the above solution, the forming disc is formed in the hollow part as a part of the hollow part. During demoulding, the forming disc is driven by the second insert and ejected together with the formed hollow part.
[0016] In summary, the beneficial technical effects of this application are:
[0017] The four first inserts, the four second inserts and the core pull are assembled and fit with the inner wall of the part, thereby forming a hollow part. During demolding, the ejector rod drives the core pull to move downward, and then the first slide mechanism drives the first insert to move inward, so that the first insert is separated from the inner wall of the formed part. Finally, the ejector plate drives the inclined ejector mechanism to move the second insert inward, thereby separating from the inner wall of the formed part. At the same time, the three second slide mechanisms on the lower template are respectively used to form the outer wall of the hollow part, so that the buckles, recesses, buckles, etc. on the outer wall of the hollow part can be smoothly formed. During demolding, after taking out the fixed insert, the third insert moves away from the formed part along the slide seat, thereby realizing the demolding of the third insert. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the hollow part in this application.
[0019] Figure 2 It is a structural diagram of the lower template in this application.
[0020] Figure 3 It is a schematic diagram of the structure of the core pulling, the first insert and the second insert.
[0021] Figure 4 Schematic diagram of the structure of the first insert in this embodiment.
[0022] Figure 5 Schematic diagram of the structure of the inclined lift mechanism in this embodiment.
[0023] Figure 6 Schematic diagram of the structure of the second slide mechanism in this embodiment.
[0024] Figure 7 It is a cross-sectional schematic diagram of core pulling.
[0025] Description of reference numerals:
[0026] 1. Lower mold plate; 2. Lower mold core; 3. Core pulling; 31. T-shaped block; 32. First protrusion; 4. Ejector stick; 5. Ejector plate; 6. First slide mechanism; 61. First insert; 62. T-shaped slot; 63. Second protrusion; 7. Slanted ejector mechanism; 71. Second insert; 72. Slanted ejector seat; 73. Slanted ejector guide block; 74. Sliding slot; 75. Third protrusion; 8. Second slide mechanism; 81. Third insert; 82. Sliding seat; 83. Spring; 84. First jack; 9. Forming disk. DETAILED DESCRIPTION
[0027] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.
[0028] The present application discloses an injection mold for a hollow part, which is mainly used to mold a hollow part, specifically, Figure 1 As shown, a circular opening is opened on the upper side of the part, a square opening is opened on the lower side of the part, and the inner side wall of the part is set inward. At the same time, a protruding buckle is set on one of the outer side walls of the part, and protrusions are also set on the two adjacent outer side walls of the part. The upper inner wall of the part has a buckle position, as shown in FIG. Figure 2 and Figure 3As shown, the injection mold includes an upper template and a lower template 1, the lower template 1 is embedded with a lower mold core 2, a core pull 3 is arranged in the lower mold core 2, the core pull 3 runs through the lower mold core 2 and the lower template 1, and a lift rod 4 and a ejector plate 5 for lifting are arranged on the side of the lower template away from the upper template. The ejector rod 4 is connected to the core pull 3 and is used to drive the core pull 3 to lift and lower. Four first sliding mechanisms 6 and four inclined ejector mechanisms 7 are arranged around the core pull 3. The first sliding mechanism 6 is installed on the lower template 1, and each first sliding mechanism 6 includes a first insert 61 for molding parts. The inclined ejector mechanism 7 is installed on the ejector plate 5. The inclined ejector mechanism 7 includes a second insert 71 for molding parts. The four first The insert 61 and the four second inserts 71 are arranged around the core pulling 3 in an interval manner, and the four first inserts 61, the four second inserts 71 and the core pulling 3 are used to cooperate with the inner wall of the part formed by the lower mold core 2 after being assembled. The four first inserts 61, the four second inserts 71 and the core pulling 3 are matched with the inner wall of the part after being assembled, thereby forming a hollow part. During demolding, the ejector rod 4 drives the core pulling 3 to move downward, and then the first sliding mechanism 6 drives the first insert 61 to move inward, so that the first insert 61 is separated from the inner wall of the formed part. Finally, the ejector plate 5 drives the inclined ejector mechanism 7 to move the second insert 71 inward, thereby separating from the inner wall of the formed part.
[0029] Specifically, the number of lower mold cores 2 is two, and the two lower mold cores 2 are symmetrically arranged on the left and right. Each lower mold core 2 corresponds to a group of first sliding mechanisms 6, a group of inclined top mechanisms 7 and a group of second sliding mechanisms 8, so that two hollow parts can be formed at the same time, thereby improving the production efficiency of hollow parts. After the four first inserts 61, the four second inserts 71 and the core pull 3 are assembled, the upper end of the core pull 3 is specifically rectangular, and the four second inserts 71 serve as corners, and each first insert 61 is located between two adjacent second inserts 71.
[0030] like Figure 3 and Figure 4 As shown, the bottom of the first insert 61 is horizontally slidably installed on the lower template 1, and the side of the first insert 61 facing the core pull 3 is provided with an inclined surface inclined from top to bottom toward the outside, and a T-shaped groove 62 is provided on the side of the first insert 61 facing the core pull 3. A T-shaped block 31 matching the T-shaped groove 62 is correspondingly provided on the core pull 3, and the T-shaped block 31 is placed in the T-shaped groove 62. The setting of the T-shaped block 31 and the T-shaped groove 62 makes the first insert 61 installed on the core pull 3 in an inclined manner, and the first insert 61 is horizontally slidably installed on the lower template 1, so that when the core pull 3 moves downward, the first insert 61 moves toward the core pull 3, so that the outer side of the first insert 61 is separated from the inner wall of the formed part.
[0031] like Figure 3 and Figure 5As shown, the inclined ejector mechanism 7 also includes an inclined ejector seat 72 and an inclined ejector guide block 73. The inclined ejector seat 72 is fixedly mounted on the ejector plate 5, and the inclined ejector guide block 73 is fixedly mounted on the lower template 1. A sliding groove 74 parallel to the ejector plate 5 is opened on the inclined ejector seat 72. The lower end of the second insert passes through the inclined ejector guide block 73 and is installed in the sliding groove 74 and slides in the sliding groove 74. The direction of the sliding groove 74 is at an angle of 45° with the edge of the ejector plate 5. The inclination direction of the second insert 71 is the same as that of the sliding groove 74. During demoulding, the ejector plate 5 drives the inclined ejector seat 72 to move upward. Due to the limitation of the inclined ejector guide block 73 and the cooperation of the sliding groove, the second insert 71 moves along its own direction, thereby separating the second insert 71 from the inner side wall of the molded part.
[0032] like Figure 2 and Figure 6 As shown, three second slide mechanisms 8 are also provided on the lower mold core 2, and the second slide mechanism 8 includes a third insert 81 and a slide seat 82. The slide seat 82 is embedded and installed on the lower mold plate 1. One end of the third insert 81 is used to cooperate with the outer wall of the molded part, and the other end of the third insert 81 is horizontally slidably installed on the slide seat 82. A spring 83 is provided on the bottom side of the third insert 81. The spring 83 is used to abut against the side of the lower mold core 2, thereby driving the third insert 81 to move away from the lower mold core 2, and a fixed plug rod (not shown in the figure) is also provided on the slide seat 82. ), a first insertion hole 84 is formed through the third insert 81, a second insertion hole aligned with the first insertion hole 84 is formed on the slider seat 82, and a fixed plug rod is used to be inserted into the first plug hole 84 and the second plug hole, so as to fix the position of the third insert 81 during molding, and the three second slider mechanisms 8 are respectively used to mold the outer wall of the hollow part, so that the buckle positions, recessed positions, buckles, etc. on the outer wall of the hollow part can be smoothly molded, and when demolding, after taking out the fixed plug rod, the third insert 81 moves away from the molded part along the slider seat 82, thereby realizing the demolding of the third insert 81.
[0033] like Figure 2 and Figure 7 As shown, a first protrusion 32 is provided on the top surface of the core pulling 3, and a second protrusion 63 and a third protrusion 75 are respectively provided on the top surfaces of part of the first insert 61 and the second insert 71. The first protrusion 32, the second protrusion 63 and the third protrusion 75 are combined to form a truncated cone. A molding disk 9 is provided on the top surface of the core pulling 3. The molding disk 9 is sleeved on the truncated cone composed of the first protrusion 32, the second protrusion 63 and the third protrusion 75. The top surface of the molding disk 9 is used to abut against the upper template during molding. Before molding, the molding disk 9 is placed on the first protrusion 32, the second protrusion 63 and the third protrusion 75. The molding disk 9 is molded in the hollow part as a part of the hollow part. During demolding, the molding disk 9 is driven by the second insert 71 and is ejected together with the molded hollow part.
[0034] The implementation principle of this embodiment is:
[0035] The lower mold core 2, the core pulling 3, the first insert 61, the second insert 71, the third insert 81, the molding disk 9 and the upper mold plate cooperate to realize the molding of the hollow part. During demolding, the upper mold plate is separated from the lower mold plate 1. After the fixed plug rod on the third insert 81 is taken out, the third insert 81 moves away from the molded part along the sliding seat 82, and then the core pulling 3 moves downward under the drive of the ejector rod 4, so that the first insert 61 moves toward the core pulling 3, so that the outer side of the first insert 61 is separated from the inner side wall of the molded part, and the ejector plate 5 drives the inclined ejector seat 72 to move upward. Due to the restriction of the inclined ejector guide block 73 and the cooperation of the sliding groove, the second insert 71 moves along its own direction, so that the second insert 71 is separated from the inner side wall of the molded part. At the same time, the second insert 71 lifts the molding disk 9 and the molded hollow part together, so that the hollow part is separated from the lower mold core 2, thereby completing the demolding.
[0036] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0037] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above examples is only used to help understand the method and core idea of the utility model; the above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the utility model, and can also combine the above-mentioned technical features 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 improvement, should be regarded as the protection scope of the utility model.
Claims
1. An injection mold for hollow parts, characterized in that: The invention comprises an upper template and a lower template (1), wherein the lower template (1) is embedded with a lower mold core (2), a core puller (3) is arranged in the lower mold core (2), and the core puller (3) passes through the lower mold core (2) and the lower template (1), and a lifting rod (4) and a lifting needle plate (5) are arranged on the side of the lower template (1) away from the upper template, and the lifting rod (4) is connected to the core puller (3) and is used to drive the core puller (3) to rise and fall, and four first sliding mechanisms (6) and four inclined lifting mechanisms (7) are arranged around the core puller (3), and the first sliding mechanism (6) ) is installed on the lower template (1), each of the first sliding mechanisms (6) includes a first insert (61) for molding parts, the inclined ejector mechanism (7) is installed on the ejector plate (5), the inclined ejector mechanism (7) includes a second insert (71) for molding parts, four of the first inserts (61) and four of the second inserts (71) are arranged around the core puller (3) in an interval manner, and the four first inserts (61), the four second inserts (71) and the core puller (3) are assembled to cooperate with the inner side wall of the lower mold core (2) to mold the part.
2. The injection mold for hollow parts according to claim 1, characterized in that: The first insert (61) is horizontally slidably mounted on the lower template (1); a side surface of the first insert (61) facing the core puller (3) is provided with an inclined surface which is inclined outward from top to bottom; a side surface of the first insert (61) facing the core puller (3) is provided with a T-shaped groove (62); a T-shaped block (31) which matches the T-shaped groove (62) is correspondingly provided on the core puller (3); and the T-shaped block (31) is placed in the T-shaped groove (62).
3. The injection mold for hollow parts according to claim 1, characterized in that: The inclined ejection mechanism (7) also includes an inclined ejection seat (72) and an inclined ejection guide block (73), wherein the inclined ejection seat (72) is fixedly mounted on the ejector plate (5), and the inclined ejection guide block (73) is fixedly mounted on the lower template (1), and a sliding groove (74) parallel to the ejector plate (5) is provided on the inclined ejection seat (72), and the lower end of the second insert passes through the inclined ejection guide block (73) and is then installed in the sliding groove (74) and slides in the sliding groove (74), and the direction of the sliding groove (74) forms an angle of 45° with the edge of the ejector plate (5), and the inclination direction of the second insert (71) is the same as the direction of the sliding groove (74).
4. The injection mold for hollow parts according to claim 1, characterized in that: The lower mold core (2) is also provided with three second slide mechanisms (8), the second slide mechanisms (8) comprising a third insert (81) and a slide seat (82), the slide seat (82) being embedded and installed on the lower mold plate (1), one end of the third insert (81) being used to cooperate with the outer wall of the molded part, the other end of the third insert (81) being horizontally slidably installed on the slide seat (82), and a fixed plug rod being also provided on the slide seat (82), a first plug hole (84) being penetrated through the third insert (81), a second plug hole aligned with the first plug hole (84) being provided on the slide seat (82), and the fixed plug rod being used to be inserted into the first plug hole (84) and the second plug hole.
5. The injection mold for hollow parts according to claim 4, characterized in that: The number of the lower mold cores (2) is specifically two, and the two lower mold cores (2) are arranged symmetrically on the left and right. Each lower mold core (2) corresponds to a group of the first sliding mechanism (6), a group of the inclined top mechanism (7) and a group of the second sliding mechanism (8).
6. The injection mold for hollow parts according to claim 1, characterized in that: A first protrusion (32) is arranged on the top surface of the core pulling (3); a second protrusion (63) and a third protrusion (75) are respectively arranged on the top surfaces of the first insert (61) and the second insert (71); the first protrusion (32), the second protrusion (63) and the third protrusion (75) are combined to form a truncated cone; a molding disk (9) is arranged on the top surface of the core pulling (3); the molding disk (9) is sleeved on the first protrusion (32), the second protrusion (63) and the third protrusion (75); the top surface of the molding disk (9) is used to abut against the upper template during molding.