Bent pipe core-pulling mold
By designing the core extraction mechanism of the bent core extraction mold, the slider is driven by the core extraction power source to slide, and the connecting core is quickly pulled out along the arc-shaped guide groove, which solves the problem of slow mold release speed of the existing mold and improves production efficiency .
Patent Information
- Application Number
- CN202421239706.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The existing mold structure and mold release methods are complex, resulting in slow demolding speed and low production efficiency of pipe bent products.
A bent pipe core extraction mold including a moving die, a fixed die and a core extraction mechanism is designed. The slider is driven to slide through the core extraction power source of the core extraction mechanism, and the two cores are quickly drawn out along the arc-shaped guide groove. Achieve rapid mold release of pipe bent products.
It effectively improves the demolding speed of the bent pipe products, shortens the production cycle, and improves the production efficiency of the product.
Smart Images
Figure CN222495273U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of moulds, in particular to a pipe bending core-pulling mould. Background Art
[0002] In industrial products, people often require products with curvature, arc shape such as U-shape and other inward-bending shapes. These products are most common in the fields of automobile air intake manifolds, industrial instruments and meters, plastic building materials connection elbows, etc. Due to the special shape of such products, the existing mold structure and demolding method are complex, making them difficult to manufacture and having a long production cycle. Utility Model Content
[0003] The utility model aims to provide a pipe bending core-pulling die, which has the advantages of increasing the demoulding speed of the pipe bending and improving the production efficiency of the product.
[0004] In order to achieve the above purpose, the solution of the utility model is:
[0005] A pipe bending core-pulling die, comprising a movable die, a fixed die and a core-pulling mechanism;
[0006] The movable mold includes a movable die plate, and the fixed mold includes a fixed die plate. The movable die plate and the fixed die plate are movably fitted to each other to form an arc-shaped curved tube cavity therebetween. The curved tube cavity is composed of a first cavity on the movable die plate and a second cavity on the fixed die plate.
[0007] The core pulling mechanism comprises two cores, two connecting rod mechanisms, a slider and a core pulling power source;
[0008] A core-pulling cavity is formed on the movable die plate at one side of the first cavity, and two arc-shaped core-pulling guide grooves are arranged in the core-pulling cavity. The two core-pulling guide grooves are symmetrically arranged along the radial center line of the middle of the first cavity;
[0009] The core and the connecting rod mechanism are symmetrically arranged, the connecting rod mechanism is connected to the core and the slider, the core cooperates with the core-pulling guide groove, and the slider is reciprocatingly connected to the movable template. The core-pulling power source is used to drive the slider to slide back and forth to drive the two connecting rod mechanisms to move. The connecting rod mechanism drives the core to slide back and forth along the core-pulling guide groove, so that the core extends into or exits the first cavity along an arc trajectory. The parts of the two cores extending into the first cavity are combined into a complete bent pipe inner core.
[0010] Furthermore, the core includes an arc-shaped inner core and a linkage part, the arc-shaped inner core movably extends into the first cavity, and the two arc-shaped inner cores are combined into a complete bent tube inner core; the linkage part is connected to a central shaft and one end of a connecting rod mechanism, the central shaft is used to slide along the core pulling guide groove, and one end of the connecting rod mechanism is spaced apart from the central shaft.
[0011] Furthermore, one end of the linkage part is connected to the end of the arc-shaped inner core, and the other end extends toward the arc-shaped outer side of the arc-shaped inner core; the central shaft is connected to the middle of the linkage part, and the outer end of the linkage part is hingedly connected to the connecting rod mechanism.
[0012] Furthermore, the connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod which are hinged to each other in sequence; the first connecting rod, the second connecting rod and the third connecting rod are in a "Z" shape when folded; the first connecting rod is connected and fixed to the slider and is arranged along the tangential direction of the bent tube cavity, the third connecting rod is hinged to the outer end of the linkage part, and the second connecting rod is hinged between the first connecting rod and the third connecting rod.
[0013] Furthermore, the end of the arc-shaped inner core connected to the linkage part forms a clamping part; the end of the first connecting rod away from the slider forms a clamping groove, and after the first connecting rod moves close to the core, the clamping groove movably extends into the first cavity, allowing the linkage part to pass through and be plugged into and matched with the clamping part.
[0014] Furthermore, the first connecting rod is columnar, and the second connecting rod is hinged in a clearance groove provided on the outer side surface of the first connecting rod.
[0015] Furthermore, the two core-pulling guide grooves are connected to a straight groove on one side away from the bent tube cavity, and the two straight grooves are arranged in parallel and at intervals.
[0016] Furthermore, two guide rails are provided on the outside of the core pulling cavity of the movable template, and the two ends of the slider are slidably engaged on the guide rails. The outer ends of the guide rails are installed with the core pulling power source, which is a core pulling cylinder, and the core pulling piston rod of the core pulling cylinder is connected to the slider.
[0017] Furthermore, the slider is located between the movable template and the fixed template; the movable template is provided with a first groove connected to the outside, and the lower part of the slider slides in the first groove; the fixed template is provided with a second groove, and the upper part of the slider is movably engaged in the second groove.
[0018] Furthermore, the fixed mold also includes guide pillars arranged around the fixed mold plate, and the movable mold plate is provided with guide pillar holes corresponding to the guide pillars, and the guide pillar holes are used for the guide pillars to be movably inserted and positioned.
[0019] After adopting the above technical scheme, the core pulling and demoulding of the injection molded product can be completed conveniently and quickly, effectively improving the production efficiency of the product. When the mold is closed for injection molding, the two cores can be combined into a complete inner core of the bent pipe, and both are located in the first cavity. After the movable mold plate and the fixed mold plate are closed, the inner core of the bent pipe is located in the middle of the bent pipe cavity surrounded by the first cavity and the second cavity, so as to realize the subsequent steps of the bent pipe injection molding; and when the bent pipe is formed, the mold is opened to separate the movable mold plate and the fixed mold plate, and the core pulling power source drives the slider to slide, and the two cores are connected to be quickly pulled out from the openings at both ends of the bent pipe, respectively, to realize the rapid demoulding of the bent pipe product, and the core pulling guide groove is provided, so that the core can be pulled out along the arc track without affecting and damaging the bent pipe product; when the bent pipe product is demoulded and taken out, the core pulling power source can drive the core to reset along the core pulling guide groove to prepare for the next injection molding. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A side view of an embodiment of the utility model;
[0021] Figure 2 A top view of an embodiment of the utility model;
[0022] Figure 3 for Figure 2 Cross-sectional view at BB;
[0023] Figure 4 A schematic diagram of mold opening of an embodiment of the utility model;
[0024] Figure 5 A three-dimensional diagram of a fixed mold according to an embodiment of the utility model;
[0025] Figure 6 A schematic diagram of a movable mold and a core pulling mechanism according to an embodiment of the utility model;
[0026] Figure 7 The movable mold and the core pulling mechanism of the embodiment of the utility model cooperate with each other, and are shown as a schematic diagram of the demoulding state;
[0027] Figure 8 This is a demoulding action diagram (I) of an embodiment of the utility model;
[0028] Fig. 9 This is a demoulding action diagram (II) of an embodiment of the utility model;
[0029] Fig.10 This is a demoulding action diagram (three) of an embodiment of the utility model.
[0030] Explanation of reference numerals: movable mold 1, movable mold plate 11, core pulling cavity 111, core pulling guide groove 112, first groove 113, straight groove 114, guide post hole 115, ejection mechanism 12, fixed mold 2, fixed mold plate 21, second groove 211, guide post 22, core pulling mechanism 3, core 31, arc-shaped inner core 311, groove 3111, convex block 3112, clamping portion 3113, linkage portion 312, connecting rod mechanism 32 , first connecting rod 321, clamping groove 3211, give way groove 3212, second connecting rod 322, third connecting rod 323, slider 33, core pulling power source 34, core pulling cylinder 341, core pulling piston rod 3411, center shaft 35, guide rail 36, mounting plate 37, bent tube cavity S, first cavity S1, second cavity S2, radial center line Z, bent tube 10, bent tube inner core 101, opening 102. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0032] like Figures 1 to 10 As shown, a core-pulling mold for a bent pipe of the utility model comprises a movable mold 1, a fixed mold 2 and a core-pulling mechanism 3.
[0033] like Figure 1 , Figures 4 to 6 The movable mold 1 includes a movable mold plate 11, and the fixed mold 2 includes a fixed mold plate 21. The movable mold plate 11 and the fixed mold plate 21 are movably fitted to each other during the process of mold opening and mold closing, and an arc-shaped elbow cavity S is formed between the two. The elbow cavity S is composed of a first cavity S1 on the movable mold plate 11 and a second cavity S2 on the fixed mold plate 21. The elbow cavity S of this embodiment can be injection molded into a "U"-shaped elbow 10 with a 180-degree angle between the two ends of the elbow.
[0034] like Figure 6 and Figure 7 The core-pulling mechanism 3 includes two cores 31 , two connecting rod mechanisms 32 , a slider 33 and a core-pulling power source 34 .
[0035] The movable die plate 11 forms a core-pulling cavity 111 on one side of the first cavity S1, and two arc-shaped core-pulling guide grooves 112 are arranged in the core-pulling cavity 111. The two core-pulling guide grooves 112 are symmetrically arranged along the radial center line Z in the middle of the first cavity S1; the core 31 and the connecting rod mechanism 32 are symmetrically arranged, the connecting rod mechanism 32 is connected to the core 31 and the slider 33, and the core 31 cooperates with the core-pulling guide groove 112; see Figures 8 to 10The slider 33 is reciprocatingly connected to the movable mold plate 11, and the core-pulling power source 34 is used to drive the slider 33 to slide back and forth, driving the two connecting rod mechanisms 32 to move. The connecting rod mechanisms 32 drive the core 31 to slide back and forth along the core-pulling guide groove 112, so that the core 31 extends into or exits the first cavity S1 along an arc trajectory. The parts of the two cores 31 extending into the first cavity S1 are combined into a complete bent tube inner core 101.
[0036] Thus, by utilizing the core-pulling mechanism 3, the core-pulling and demoulding of the injection-molded product can be completed conveniently and quickly, thereby effectively improving the production efficiency of the product. When the mold is closed for injection molding, the two cores 31 are combined into a complete bent tube inner core 101, and both are located in the first cavity S1. After the movable template 11 and the fixed template 21 are closed, the bent tube inner core 101 is located in the middle of the bent tube cavity S surrounded by the first cavity S1 and the second cavity S2, so as to realize the subsequent step of bent tube 10 injection molding; and when the bent tube 10 is formed, the mold is opened to separate the movable template 11 and the fixed template 21, and the core pulling power source 34 drives the slider 33 to slide, and the two cores 31 are linked to be quickly pulled out from the openings 102 at both ends of the bent tube 10, respectively, to realize the rapid core pulling and demolding of the bent tube 10 product, and the core pulling guide groove 112 is provided, so that the core 31 can be pulled out along the arc trajectory without affecting and damaging the bent tube 10 product; when the bent tube 10 product is demolded and taken out, the core pulling power source 34 can drive the core 31 to return along the core pulling guide groove 112 to prepare for the next injection molding.
[0037] The movable mold 1 further includes an ejection mechanism 12. The bent pipe 10 product can be ejected from the mold by means of the ejection mechanism 12. The ejection mechanism 12 can adopt existing technology, and the specific structure will not be described in detail here.
[0038] like Figure 6 The core 31 may include an arcuate inner core 311 and a linkage portion 312. The arcuate inner core 311 movably extends into the first cavity S1. The two arcuate inner cores 311 are combined into the complete curved tube inner core 101. The abutting ends of the two arcuate inner cores 311 may be respectively provided with grooves 3111 and protrusions 3112 to strengthen the alignment; the linkage portion 312 is connected to a central shaft 35 and one end of a connecting rod mechanism 32. The central shaft 35 is used to slide along the core-pulling guide groove 112 to drive the core 31 to slide. The central shaft 35 is inserted into the core-pulling guide groove 112; and one end of the connecting rod mechanism 32 may be spaced apart from the central shaft 35 so that the connecting rod mechanism 32 is located outside the core 31.
[0039] One end of the linkage part 312 is connected to the end of the arc-shaped inner core 311, and the other end extends toward the arc-shaped outer side of the arc-shaped inner core 311; the central shaft 35 is penetrated and connected to the middle of the linkage part 312, and the outer end of the linkage part 312 is hingedly connected to the connecting rod mechanism 32.
[0040] The connecting rod mechanism 32 includes a first connecting rod 321, a second connecting rod 322 and a third connecting rod 323 which are hinged to each other in sequence; the first connecting rod 321, the second connecting rod 322 and the third connecting rod 323 can be in a "Z" shape when folded; the first connecting rod 321 is connected and fixed to the slider 33, and can be arranged roughly along the tangential direction of the curved tube cavity S, the third connecting rod 323 is hinged to the outer end of the linkage part 312, and the second connecting rod 322 is hinged between the first connecting rod 321 and the third connecting rod 323.
[0041] Therefore, see Figure 7 When the first link 321 reciprocates with the slider 33, the second link 322 and the third link 323 can be used to link the linking part 312, and the linking part 312 and the arc-shaped inner core 311 are affected by the central shaft 35 limited in the core-pulling guide groove 112, so that the core 31 as a whole can move along the core-pulling guide groove 112 in an arc-shaped trajectory, thereby realizing rapid core-pulling demoulding. The link mechanism 32 is configured to be hinged with multiple parts, which can reduce the length of the link mechanism 32 and the volume of the mold, so as to facilitate production.
[0042] like Figure 3 , Figure 4 and Figure 7 As shown, the slider 33 is located between the movable plate 11 and the fixed plate 21; the movable plate 11 is provided with a first groove 113 connected to the outside, and the lower part of the slider 33 is slidably located in the first groove 113; the fixed plate 21 is provided with a second groove 211, and the upper part of the slider 33 is movably engaged in the second groove 211. This can facilitate the mold closing and positioning, and ensure that the position of the slider 33 is fixed in the mold closing state.
[0043] Two guide rails 36 may be provided outside the core-pulling cavity 111 of the movable plate 11, and the inner ends of the two guide rails 36 may be fixed on both sides of the first groove 113; the two ends of the slider 33 are slidably matched on the guide rails 36, so that the slider 33 is slidably mounted between the two guide rails 36; the outer ends of the guide rails 36 are installed with the core-pulling power source 34, and the core-pulling power source 34 is fixed on a mounting plate 37 whose two ends are connected to the outer ends of the two guide rails 36. The core-pulling power source 34 may be a core-pulling oil cylinder 341, and the core-pulling piston rod 3411 of the core-pulling oil cylinder 341 is connected to the slider 33. Therefore, the slider 33 can slide back and forth along the two guide rails 36 under the action of the core-pulling piston rod 3411.
[0044] In this embodiment, Fig.10 and Figure 7The end of the arc-shaped inner core 311 connected to the linkage part 312 can form a clamping part 3113; the end of the first connecting rod 321 away from the slider 33 forms a clamping groove 3211. After the first connecting rod 321 moves close to the core 31, the clamping groove 3211 moves into the first cavity S1, allowing the linkage part 312 to pass through and then plug and match with the clamping part 3113. Therefore, the first connecting rod 321 is fixed by the slider 33, and then it can also play the role of clamping and supporting the core 31, which can ensure that the core 31 is always kept in the center of the injection cavity.
[0045] Specifically, the first connecting rod 321 can be columnar, while the second connecting rod 322 and the third connecting rod 323 can be plate-shaped. The second connecting rod 322 is hinged in a clearance groove 3212 set on the outer side of the first connecting rod 321 to prevent the first connecting rod 321 and the second connecting rod 322 from interfering with each other when the connecting rod mechanism 32 is in motion.
[0046] like Figure 6 and Figure 7 The two core-pulling guide grooves 112 are connected to a straight groove 114 on one side away from the elbow cavity S. The two straight grooves 114 are arranged in parallel and spaced apart. In this embodiment, the straight grooves 114 are arranged so that the connecting rod mechanism 32 can pull the two cores 31 to move along an arc track and then perform a straight line movement to completely exit the first cavity S1, which is convenient for demoulding.
[0047] like Figure 4 As shown, the fixed mold 2 further includes guide posts 22 arranged around the fixed mold plate 21 , and the movable mold plate 11 is provided with guide post holes 115 corresponding to the guide posts 22 , and the guide post holes 115 are used for the guide posts 22 to be movably inserted and positioned.
[0048] The above is only a preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the utility model should still fall within the protection scope of the utility model.
[0049] In the description of the embodiments of the present application, it should be understood that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0050] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.
Claims
1. A pipe bending core-pulling die, characterized in that: Including movable mold, fixed mold and core pulling mechanism; The movable mold includes a movable die plate, and the fixed mold includes a fixed die plate. The movable die plate and the fixed die plate are movably fitted to each other to form an arc-shaped curved tube cavity therebetween. The curved tube cavity is composed of a first cavity on the movable die plate and a second cavity on the fixed die plate. The core pulling mechanism comprises two cores, two connecting rod mechanisms, a slider and a core pulling power source; A core-pulling cavity is formed on the movable die plate at one side of the first cavity, and two arc-shaped core-pulling guide grooves are arranged in the core-pulling cavity. The two core-pulling guide grooves are symmetrically arranged along the radial center line of the middle of the first cavity; The core and the connecting rod mechanism are symmetrically arranged, the connecting rod mechanism is connected to the core and the slider, the core cooperates with the core-pulling guide groove, and the slider is reciprocatingly connected to the movable template. The core-pulling power source is used to drive the slider to slide back and forth to drive the two connecting rod mechanisms to move. The connecting rod mechanism drives the core to slide back and forth along the core-pulling guide groove, so that the core extends into or exits the first cavity along an arc trajectory. The parts of the two cores extending into the first cavity are combined into a complete bent pipe inner core.
2. A pipe bending core-pulling die according to claim 1, characterized in that: The core includes an arc-shaped inner core and a linkage part. The arc-shaped inner core movably extends into the first cavity. The two arc-shaped inner cores are combined to form a complete bent tube inner core. The linkage part is connected to a central shaft and one end of a connecting rod mechanism. The central shaft is used to slide along the core-pulling guide groove. One end of the connecting rod mechanism is spaced apart from the central shaft.
3. A pipe bending core-pulling die according to claim 2, characterized in that: One end of the linkage part is connected to the end of the arc-shaped inner core, and the other end extends toward the arc-shaped outer side of the arc-shaped inner core; the central shaft is penetrated and connected to the middle of the linkage part, and the outer end of the linkage part is hingedly connected to the connecting rod mechanism.
4. A pipe bending core-pulling die according to claim 3, characterized in that: The connecting rod mechanism includes a first connecting rod, a second connecting rod and a third connecting rod which are hinged to each other in sequence; the first connecting rod, the second connecting rod and the third connecting rod are in a "Z" shape when folded; the first connecting rod is connected and fixed to the slider and is arranged along the tangential direction of the curved tube cavity, the third connecting rod is hinged to the outer end of the linkage part, and the second connecting rod is hinged between the first connecting rod and the third connecting rod.
5. A pipe bending core-pulling die according to claim 4, characterized in that: The end of the arc-shaped inner core connected to the linkage part forms a clamping part; the end of the first connecting rod away from the slider forms a clamping groove. After the first connecting rod moves close to the core, the clamping groove moves into the first cavity for the linkage part to pass through and then be plugged into and matched with the clamping part.
6. A pipe bending core-pulling die according to claim 5, characterized in that: The first connecting rod is columnar, and the second connecting rod is hinged in a clearance groove arranged on the outer side of the first connecting rod.
7. The pipe bending core-pulling die according to claim 1, characterized in that: The two core-pulling guide grooves are connected to a straight groove at one side away from the bent tube cavity, and the two straight grooves are arranged in parallel and at intervals.
8. The core-pulling die for bent pipe according to claim 1, characterized in that: Two guide rails are arranged outside the core pulling cavity of the movable template, and the two ends of the slider are slidably fitted on the guide rails. The core pulling power source is installed at the outer end of the guide rail. The core pulling power source is a core pulling cylinder, and the core pulling piston rod of the core pulling cylinder is connected to the slider.
9. The pipe bending core-pulling die according to claim 1, characterized in that: The slider is located between the movable template and the fixed template; the movable template is provided with a first groove connected to the outside, and the lower part of the slider slides in the first groove; the fixed template is provided with a second groove, and the upper part of the slider is movably embedded in the second groove.
10. The pipe bending core-pulling die according to claim 1, characterized in that: The fixed mold also includes guide pillars arranged around the fixed mold plate, and the movable mold plate is provided with guide pillar holes corresponding to the guide pillars, and the guide pillar holes are used for the guide pillars to be movably inserted and positioned.