Elbow pipe arc demolding and core-pulling mechanism and core-pulling mold

Abstract

The utility model provides a bent pipe arc demolding core-pulling mechanism and a core-pulling mold, the bent pipe arc demolding core-pulling mechanism comprises a first core-pulling assembly and a second core-pulling assembly, the first core-pulling assembly comprises a first core-pulling driving device and a first core-pulling head, the second core-pulling assembly comprises a second core-pulling driving device and a second core-pulling head, the first core-pulling head is provided with a lead angle mold core moving part, and the second core-pulling head is provided with a lead angle mold core moving part. And the lead angle mold core moving part can be used for shaping the lead angle in the elbow pipe. The bent pipe core-pulling mechanism has the beneficial effects that the problems that due to the arrangement of the bent pipe core-pulling mechanism in the prior art, the inner sharp corner problem of the bent pipe is obvious, and the flow and the pressure of fluid are affected can be solved, the inner lead corner of the bent pipe is shaped independently through the product structure and the lead corner mold core moving part, so that the lead corner is an arc surface, and the production efficiency is improved. The probability that the flow and pressure of fluid are affected by the shape of the lead angle is effectively reduced, the lead angle mold core moving part can be driven to be separated from or close to the inner lead angle of the bent pipe through the first core pulling assembly, it is guaranteed that the core pulling efficiency is quite high, and the competitiveness of an enterprise is improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding, and in particular to a curved pipe arc demoulding core pulling mechanism and a core pulling mold. Background Art

[0002] With the continuous development of the injection molding field, the application scope of injection molding products is becoming wider and wider, which also makes the requirements for injection molding products higher and higher. Figure 1 It is a pipe bending product used for the gas guide pipe of new energy vehicles. The existing core pulling mechanism uses the ordinary slider to pull the core, resulting in relatively large sharp corners at the corners of the produced plastic parts, such as Figure 1 At point A, the sharp angle setting can easily affect the flow and pressure of the fluid, which cannot meet the needs of plastic products and is not conducive to improving the competitiveness of the enterprise. Summary of the invention

[0003] In order to solve the problems in the prior art, the present invention provides a curved pipe arc demoulding core pulling mechanism and a core pulling mold, which solves the problem of the setting of the curved pipe core pulling mechanism in the prior art, the problem of obvious sharp corners inside the curved pipe, and the problem of affecting the flow and pressure of the fluid.

[0004] The present invention discloses a curved pipe arc demoulding core pulling mechanism, comprising a first core pulling assembly and a second core pulling assembly, wherein the first core pulling assembly comprises a first core pulling driving device and a first core pulling head, and the second core pulling assembly comprises a second core pulling driving device and a second core pulling head, wherein a chamfered core movable part is arranged on the first core pulling head, and the chamfered core movable part can be used for shaping the inner chamfered angle of the curved pipe, and the first core pulling assembly can drive the chamfered core movable part to separate from or approach the inner chamfered angle of the curved pipe.

[0005] The present invention is further improved, a movable cavity cooperating with the chamfer core movable part is provided in the first core pulling head, the chamfer core movable part can swing in the movable cavity, the cross-section of the chamfer core movable part cooperating with the chamfer inside the bent pipe is an inclined surface, a driving inclined surface is provided on one end of the first core pulling head facing the chamfer core movable part, the chamfer core movable part is provided with a sliding inclined surface cooperating with the driving inclined surface, and the first core pulling head can push the chamfer core movable part close to the chamfer inside the bent pipe through the driving inclined surface.

[0006] The present invention is further improved in that a limiting portion cooperating with the movable part of the chamfer core is arranged in the movable cavity, and the limiting portion can prevent the movable part of the chamfer core from falling off.

[0007] The present invention is further improved, the limiting part is a shaft hole passing through both sides of the movable cavity, a limiting shaft is arranged in the shaft hole, and a guide long hole cooperating with the limiting shaft is arranged on the movable part of the chamfer core, and the limiting shaft can cooperate with the guide long hole to limit the movable part of the chamfer core.

[0008] The present invention is further improved in that an arc surface cooperating with the chamfer core movable part is arranged at one end of the second core pulling head close to the chamfer core movable part, and the chamfer core movable part can perform arc motion in coordination with the arc surface.

[0009] The present invention is further improved, the movable cavity includes a fixed end and a disengagement end, the disengagement end is inclined away from the guide angle direction of the bend, and the diameter of the disengagement end is larger than the fixed end, and an air avoidance slope is provided at one end of the guide angle core movable part close to the fixed end.

[0010] The present invention also discloses a core-pulling mold, comprising an upper mold plate, a lower mold plate, an upper cavity plate, a lower cavity plate and a curved tube arc demolding core-pulling mechanism, an injection cavity is cooperatively arranged in the upper cavity and the lower cavity, an inclined chamfer that cooperates with a chamfer core movable part is arranged in the injection cavity, an injection runner groove is arranged on the upper cavity plate and the lower cavity plate, and the injection runner groove is connected to the injection cavity.

[0011] The present invention is further improved, the first core pulling drive device includes a first hydraulic cylinder and a first mounting plate, the number of the first core pulling heads is two, the two first core pulling heads are symmetrically mounted on the first mounting plate, the moving end of the first hydraulic cylinder is connected to the first mounting plate, the lower template is provided with a first guide rail, the first mounting plate is provided with a first guide slider matching the first guide rail, and the first mounting plate is slidably connected to the first guide rail.

[0012] The present invention is further improved, the second core pulling drive device includes a second hydraulic cylinder and a second mounting plate, the number of second core pulling heads is two, the two second core pulling heads are symmetrically mounted on the second mounting plate, the moving end of the second hydraulic cylinder is connected to the second mounting plate, the second guide rail is arranged on the lower template, the second mounting plate is provided with a second guide slider matching the second guide rail, and the second mounting plate is slidably connected to the second guide rail.

[0013] The present invention is further improved in that the number of the first core pulling components and the number of the second core pulling components are both two groups, the two groups of first core pulling components and the two groups of second core pulling components cooperate one by one, and four injection cavities are arranged on the upper cavity plate and the lower cavity plate.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a curved pipe arc demoulding core pulling mechanism, and its structure can effectively solve the setting of the curved pipe core pulling mechanism in the prior art, and there is an obvious problem of sharp corners inside the curved pipe, and there is a problem of affecting the flow rate and pressure of the fluid. By using this product structure, the chamfer core movable part independently shapes the chamfer inside the curved pipe, so that the chamfer is an arc surface, which effectively reduces the probability that the chamfer shape affects the flow rate and pressure of the fluid, and the chamfer core movable part can be driven to separate from or approach the inner chamfer of the curved pipe through the first core pulling assembly, thereby ensuring that the core pulling efficiency is relatively efficient, which is beneficial to improving the competitiveness of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the present invention or the solutions in the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is a schematic diagram of the overall structure of plastic products processed by traditional methods;

[0017] Figure 2 It is a schematic diagram of the structure of the core-pulling mold in the embodiment;

[0018] Figure 3 This is a schematic diagram of the exploded structure of the first core pulling head;

[0019] Figure 4 It is a cross-sectional structural diagram of the first stage of core pulling of the arc demoulding core pulling mechanism of the pipe bending invention;

[0020] Figure 5 It is a cross-sectional structural diagram of the second stage of core pulling of the arc demoulding core pulling mechanism of the pipe bending of the invention;

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of the third stage of core pulling of the arc demoulding core pulling mechanism for the bent pipe of the invention. DETAILED DESCRIPTION

[0022] Unless otherwise defined, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0023] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive, independent, or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in the present invention may be combined with other embodiments.

[0024] In order to enable those skilled in the art to better understand the 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.

[0025] like Figure 1-6 As shown, a core-pulling mold of the present invention comprises an upper mold plate, a lower mold plate 1, an upper cavity plate, a lower cavity plate 2 and a curved pipe arc demoulding core-pulling mechanism.

[0026] The arc demoulding core pulling mechanism of the bent pipe includes a first core pulling assembly and a second core pulling assembly. The first core pulling assembly includes a first core pulling drive device 3 and a first core pulling head 4. The second core pulling assembly includes a second core pulling drive device 5 and a second core pulling head 6. The first core pulling head 4 is provided with a chamfer core movable part 7.

[0027] By shaping the inner chamfer of the curved pipe separately through the chamfer core movable part 7, the sharp angle at the chamfer can be effectively reduced to reduce the impact of the use of the plastic product 9. Through the setting of the first core pulling component, the chamfer core movable part 7 can be flexibly adjusted to be separated from or close to the inner chamfer of the curved pipe.

[0028] The first core pulling head 4 is provided with an active cavity cooperating with the chamfer core movable part 7, and the chamfer core movable part 7 can swing in the active cavity. The cross-section of the chamfer core movable part 7 cooperating with the chamfer inside the bent pipe is an inclined surface. The chamfer core movable part 7 includes a slide rod 71 and a core arc head 72 arranged on the slide rod 71. The first core pulling head 4 is provided with a driving inclined surface 41 on one end facing the chamfer core movable part 7, and the lower end surface of the core arc head 72 of the chamfer core movable part 7 is provided with a sliding inclined surface cooperating with the driving inclined surface 41.

[0029] The first core pulling head 4 can push the chamfered core movable part 7 to approach the chamfered corner inside the curved pipe by driving the inclined surface 41, so as to realize the injection molding process and the core pulling process.

[0030] A limiting portion cooperating with the movable part 7 of the chamfer core is arranged in the movable cavity, and the limiting portion can prevent the movable part 7 of the chamfer core from falling off.

[0031] The limiting part is a shaft hole penetrating through both sides of the movable cavity, in which a limiting shaft 8 is arranged, and a guide strip hole 73 cooperating with the limiting shaft 8 is arranged on the movable part 7 of the chamfer core.

[0032] By setting the limiting rotating shaft 8, the movable part 7 of the chamfer core can be limited in cooperation with the guiding long hole 73 to prevent the movable part 7 of the chamfer core from being separated.

[0033] An arc surface cooperating with the chamfer core movable part 7 is arranged at one end of the second core pulling head 6 close to the chamfer core movable part 7 .

[0034] The movable part of the chamfered core can perform circular motion in coordination with the circular surface.

[0035] The movable cavity includes a fixed end 42 and a disengagement end 43 . The disengagement end 43 is inclined away from the inner chamfer of the bend pipe, and the diameter of the disengagement end 43 is larger than the fixed end 42 . The end of the chamfer core movable part 7 close to the fixed end 42 is provided with an air avoidance slope.

[0036] By setting the disengagement end 43, the space where the movable part 7 of the chamfered core can move can be kept away from the inner chamfer of the curved pipe, so as to realize the core pulling action, and the space-avoiding inclined surface can facilitate the movable part 7 of the chamfered core to move better.

[0037] An injection cavity is arranged in the upper cavity and the lower cavity, and an inclined chamfer which cooperates with the chamfer core movable part 7 is arranged in the injection cavity. An injection runner groove 21 is arranged on both the upper cavity plate and the lower cavity plate 2, and the injection runner groove 21 is connected to the injection cavity.

[0038] The injection molding cavity is fed with materials through the injection molding runner groove 21 to carry out the injection molding process.

[0039] The first core pulling drive device 3 includes a first hydraulic cylinder and a first mounting plate 31. There are two first core pulling heads 4. The two first core pulling heads 4 are symmetrically mounted on the first mounting plate 31. The moving end of the first hydraulic cylinder is connected to the first mounting plate 31. The lower template 1 is provided with a first guide rail 10. The first mounting plate 31 is provided with a first guide slider that cooperates with the first guide rail 10. The first mounting plate 31 is slidably connected to the first guide rail 10.

[0040] By disposing two groups of first core pulling heads 4, it is possible to complete the core pulling of multiple groups of products by using the first hydraulic cylinder.

[0041] The second core pulling drive device 5 includes a second hydraulic cylinder and a second mounting plate 51. The number of second core pulling heads 6 is two. The two second core pulling heads 6 are symmetrically mounted on the second mounting plate 51. The moving end of the second hydraulic cylinder is connected to the second mounting plate 51. A second guide rail is provided on the lower template 1. A second guide slider matching the second guide rail is provided on the second mounting plate 51. The second mounting plate 51 is slidably connected to the second guide rail.

[0042] By disposing two groups of second core pulling heads 6, it is possible to complete the core pulling of multiple groups of products by using the second hydraulic cylinder.

[0043] The number of the first core pulling components and the second core pulling components are both two groups, and the two groups of first core pulling components and the two groups of second core pulling components cooperate with each other. Four injection cavities are arranged on the upper cavity plate and the lower cavity plate 2, so that four plastic products 9 can be processed and core pulled at the same time.

[0044] The working process of the arc demoulding and core pulling mechanism of the bent pipe in this embodiment is as follows: Compared with the existing bent pipe core pulling structure, the embodiment of the present invention provides an advantage that the chamfer angle is an arc surface, and the plastic product 9 has a better user experience.

[0045] Before core pulling, Figure 4 In the first stage, the first core pulling head 4, the chamfer core movable part 7 and the second core pulling head 6 cooperate closely, the first core pulling driving device 3 is pulled outward from the first core pulling head 4, and the limit shaft 8 is linked together, and the limit shaft 8 moves from one end of the guide long hole 73 to the other end.

[0046] like Figure 5 In the second stage, the limiting shaft 8 moves to the other end.

[0047] After moving to the other end, the core arc head 72 leaves the driving inclined surface 41, and the first core pulling drive device 3 continues to pull the core. Due to the matching relationship between the inner guide angle of the bent tube and the inclined surface of the core arc head 72, the core arc head 72 will be pushed downward, and the slide rod 71 will tilt downward at the disengagement end 43.

[0048] like Figure 6 In the third stage, the first core pulling driving device 3 continues to pull the core, and the chamfer core movable part 7 completely detaches from the chamfer inside the bent pipe, completing the core pulling of the first core pulling assembly, and then the second core pulling assembly performs core pulling to complete the core pulling process.

[0049] When the injection molding process is required, the second core pulling driving device 5 drives the second core pulling head 6 to move into the injection molding cavity.

[0050] After being moved into position, the first core pulling assembly starts to work, and the core arc head 72 moves upward under the action of the arc surface of the second core pulling head 6.

[0051] And through the cooperation between the driving inclined surface 41 and the sliding inclined surface, the core arc head 72 is arranged above the driving inclined surface 41 to complete the splicing of the entire core.

[0052] The adoption of this mechanism can effectively solve the setting of the core-pulling mechanism for bent pipes in the prior art, which has obvious problems with sharp corners inside the bent pipe and affects the flow and pressure of the fluid. By using this product structure, the chamfered core movable part 7 independently shapes the chamfer inside the bent pipe, so that the chamfer is an arc surface, which effectively reduces the probability that the chamfer shape affects the flow and pressure of the fluid, and the chamfered core movable part 7 can be driven by the first core-pulling assembly to separate from or approach the inner chamfer of the bent pipe, thereby ensuring that the core-pulling efficiency is relatively high and is conducive to improving the competitiveness of the enterprise.

[0053] The specific implementation modes described above are preferred implementation modes of the present invention, and are not intended to limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to the specific implementation modes, and all equivalent changes made according to the present invention are within the protection scope of the present invention.

Claims

1. A pipe bending arc demoulding and core pulling mechanism, characterized in that: It includes a first core pulling assembly and a second core pulling assembly, the first core pulling assembly includes a first core pulling drive device and a first core pulling head, the second core pulling assembly includes a second core pulling drive device and a second core pulling head, the first core pulling head is provided with a chamfer core movable part, the chamfer core movable part can be used for shaping the inner chamfer of the bent pipe, and the first core pulling assembly can drive the chamfer core movable part to separate from or approach the inner chamfer of the bent pipe.

2. The arc demoulding and core pulling mechanism for curved pipe according to claim 1, characterized in that: The first core pulling head is provided with an active cavity cooperating with the chamfered core movable part, the chamfered core movable part can swing in the active cavity, the cross-section of the chamfered core movable part cooperating with the chamfered angle inside the bent pipe is an inclined surface, the first core pulling head is provided with a driving inclined surface on one end facing the chamfered core movable part, the chamfered core movable part is provided with a sliding inclined surface cooperating with the driving inclined surface, and the first core pulling head can push the chamfered core movable part close to the chamfered angle inside the bent pipe through the driving inclined surface.

3. The arc demoulding and core pulling mechanism for curved pipe according to claim 2, characterized in that: A limiting portion cooperating with the movable part of the chamfer core is arranged in the movable cavity, and the limiting portion can prevent the movable part of the chamfer core from falling off.

4. The arc demoulding and core pulling mechanism for curved pipe according to claim 3, characterized in that: The limiting portion is a shaft hole passing through both sides of the movable cavity, a limiting shaft is arranged in the shaft hole, a guide strip hole cooperating with the limiting shaft is arranged on the movable part of the chamfer core, and the limiting shaft can cooperate with the guide strip hole to limit the movable part of the chamfer core.

5. The arc demoulding and core pulling mechanism for curved pipe according to claim 1, characterized in that: The second core pulling head is provided with an arc surface cooperating with the chamfer core movable part at one end thereof close to the chamfer core movable part, and the chamfer core movable part can perform an arc motion in cooperation with the arc surface.

6. The arc demoulding and core pulling mechanism for curved pipe according to claim 2, characterized in that: The movable cavity includes a fixed end and a disengagement end, the disengagement end is inclined away from the inner chamfer of the bend, and the caliber of the disengagement end is larger than the fixed end, and the movable part of the chamfer core is provided with an air avoidance inclined surface at one end close to the fixed end.

7. A core-pulling mold, characterized in that: It comprises an upper mold plate, a lower mold plate, an upper cavity plate, a lower cavity plate and the curved tube arc demolding and core pulling mechanism as described in any one of claims 1 to 6, the upper cavity and the lower cavity are cooperated with an injection cavity, the injection cavity is provided with an inclined chamfer that cooperates with the chamfer core movable part, the upper cavity plate and the lower cavity plate are both provided with an injection runner groove, and the injection runner groove is connected to the injection cavity.

8. The core-pulling mold according to claim 7, characterized in that: The first core pulling drive device includes a first hydraulic cylinder and a first mounting plate. The number of the first core pulling heads is two, and the two first core pulling heads are symmetrically mounted on the first mounting plate. The moving end of the first hydraulic cylinder is connected to the first mounting plate. A first guide rail is arranged on the lower template, and a first guide slider matching the first guide rail is arranged on the first mounting plate. The first mounting plate is slidably connected to the first guide rail.

9. The core-pulling mold according to claim 8, characterized in that: The second core pulling drive device includes a second hydraulic cylinder and a second mounting plate. The number of the second core pulling heads is two, and the two second core pulling heads are symmetrically mounted on the second mounting plate. The moving end of the second hydraulic cylinder is connected to the second mounting plate. A second guide rail is arranged on the lower template, and a second guide slider matching the second guide rail is arranged on the second mounting plate. The second mounting plate is slidably connected to the second guide rail.

10. The core-pulling mold according to claim 9, characterized in that: The number of the first core pulling components and the number of the second core pulling components are both two groups, the two groups of first core pulling components and the two groups of second core pulling components cooperate one by one, and four injection cavities are arranged on the upper cavity plate and the lower cavity plate.

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