Plastic part back-off core-pulling ejection linkage forced demolding mold structure

Abstract

The utility model provides a plastic part back-off core-pulling ejection linkage forced demolding mold structure which comprises a fixed mold core, a movable mold core, a first side pulling mechanism and a second side pulling mechanism, the movable mold core is provided with an upper forming groove, and the fixed mold core is provided with a lower forming groove; the first side pulling mechanism comprises a first side sliding block and a forming needle; the second side pulling mechanism comprises a second side sliding block and an ejector block, a stepped oval groove is formed in the end face of the second side sliding block, a forming rod is installed in the oval groove, one end of the forming rod is arranged in the oval groove, the other end of the forming rod is arranged on the fixed mold core, a forming notch is formed in the side face of one end of the forming rod, an ejector rod is installed on the ejector plate, and the upper end of the ejector rod is connected with the ejector block. During mold closing, the upper forming groove and the lower forming groove form the support body, the forming rod is used for forming an inverted buckle, during mold opening, the forming needle leaves the support, the ejector plate pushes the ejector block upwards, the forming rod is driven to slide upwards along the oval groove along the support, the support leaves the fixed mold core, the second side sliding block drives the forming rod to be pulled out of the support, and demolding of the inverted buckle of the support is achieved. The mold cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a plastic part undercut core-pulling ejection linkage strong mold release structure. Background Art

[0002] The mold is a tool used to make molded products. Different shapes of molds are used to make products of different shapes, such as Figure 1-2 The bracket shown in the figure has circular grooves at both ends, a fixing portion is arranged on the side of the bracket close to the circular groove, and an undercut is arranged on the inner wall of the fixing portion. The traditional molding mold for the undercut of the bracket needs to additionally design a slider ejection structure to realize the molding and demolding of the undercut of the bracket, which makes the overall mold structure complicated. Therefore, a new mold structure for the molding and demolding of the undercut of the bracket is urgently needed. Utility Model Content

[0003] The utility model provides a plastic part undercut core pulling and ejecting linkage strong mold release structure, aiming to solve the technical problems mentioned in the above technical background.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: a plastic part undercut core-pulling ejection linkage strong demolding structure, comprising a panel, a pad, a movable mold plate, a fixed mold plate, an ejector plate and a bottom plate from top to bottom, a fixed mold core is embedded in the fixed mold plate, a movable mold core is embedded in the movable mold plate, an upper molding groove is formed on the movable mold core, a lower molding groove is formed on the fixed mold core, and a first side extraction mechanism and a second side extraction mechanism are respectively provided on the fixed mold core on both sides of the fixed mold core;

[0005] The first side-drawing mechanism comprises a first side slider, and the first side slider is provided with a molding needle on the end surface facing the fixed mold core;

[0006] The second side-drawing mechanism includes a second side slider and a push block. The second side slider is provided with a stepped elliptical groove on the end surface facing the fixed mold core. A forming rod is installed in the elliptical groove. One end of the forming rod can be slid up and down and placed in the elliptical groove, and the other end can be slidably passed through the push block and placed on the fixed mold core. The forming rod extends to the fixed mold core and has a forming notch on the side surface of one end. A plurality of push rods are installed on the ejector plate. The push rods can slide upward through the fixed mold plate to connect to the push block.

[0007] Furthermore, a plurality of ejector pins are further arranged on the ejector pin plate, and the ejector pins can slide upward through the fixed mold plate and the fixed mold core.

[0008] Furthermore, the top block is provided with a plurality of through holes, sleeves are embedded in the through holes, and the forming rod can slidably pass through the sleeves.

[0009] Furthermore, the second side withdrawal mechanism further includes a hydraulic cylinder installed on the side of the fixed template, and the piston rod of the hydraulic cylinder is connected to the second side sliding block.

[0010] Furthermore, limit switches are further installed on the fixed template on both sides of the second side slider.

[0011] Furthermore, a guide block is further installed on the side of the fixed mold core close to the first side slide block, and the guide block is provided with a plurality of guide holes, and the molding needle passes through the guide holes.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model discloses a plastic part undercut core-pulling ejection linkage strong demolding structure, comprising a panel, a pad, a movable template, a fixed template, an ejector plate and a bottom plate, the fixed template is embedded with a fixed mold core, the movable template is embedded with a movable mold core, the movable mold core is provided with an upper molding groove, the fixed mold core is provided with a lower molding groove, a first side extraction mechanism and a second side extraction mechanism are respectively arranged on both sides of the fixed mold core on the fixed template; the first side extraction mechanism comprises a first side slider, and a molding needle is arranged on the end surface of the first side slider facing the fixed mold core; the second side extraction mechanism comprises a second side slider and an ejector block, the end surface of the second side slider facing the fixed mold core is provided with a stepped elliptical groove, a molding rod is arranged in the elliptical groove, one end of the molding rod can be slid up and down and placed in the elliptical groove, and the other end can be slidably passed through the ejector block and placed on the fixed mold core, a molding notch is arranged on the side surface of one end of the molding rod extending to the fixed mold core, a plurality of ejector rods are arranged on the ejector plate, and the ejector rods can slide upward through the fixed template to connect the ejector block. When the mold is closed, the fixed mold core and the movable mold core are closed, the upper molding groove and the lower molding groove are closed to form a molding cavity, and the molding rod is placed in the cavity for molding undercuts. When the mold is opened, the first side slider drives the molding needle to leave the bracket, and the ejector plate pushes the ejector block upward to float upward, driving the molding rod connected to the bracket to slide upward along the elliptical groove, and the bracket leaves the fixed mold core. Finally, the second side slider drives the molding rod to be pulled out of the bracket to realize the undercut demolding of the bracket. The structure is simple and the mold cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 is a schematic diagram of the support structure;

[0016] Figure 2 is a cross-sectional view of the support structure;

[0017] Figure 3 It is a schematic diagram of the utility model plastic part undercut core-pulling ejection linkage strong mold release structure;

[0018] Figure 4 It is a structural schematic diagram of a fixed template of the utility model plastic part undercut core-pulling ejection linkage strong demoulding structure;

[0019] Figure 5 It is a schematic diagram of the structure of the movable template of the utility model plastic part undercut core-pulling ejection linkage strong mold release structure;

[0020] Figure 6 It is a cross-sectional view of the first side extraction mechanism and the second side extraction mechanism of the utility model plastic part undercut core extraction and ejection linkage strong mold release structure;

[0021] Figure 7 This is a structural exploded diagram of the second side extraction mechanism of the utility model plastic part undercut core extraction and ejection linkage strong mold release structure;

[0022] Figure 8 It is an exploded view of the first side extraction mechanism of the utility model plastic part undercut core extraction ejection linkage strong mold release structure.

[0023] Main component symbols

[0024] 10. Panel;

[0025] 20. Pad;

[0026] 30, movable template; 301, movable mold core; 3011, upper molding groove;

[0027] 40, fixed mold plate; 401, fixed mold core; 4011, guide block; 4012, lower molding groove; 402, limit switch;

[0028] 41. first side extraction mechanism; 411. first side slider; 4111. forming needle;

[0029] 42, second side extraction mechanism; 421, second side slider; 4211, elliptical groove; 422, top block; 4221, sleeve; 423, hydraulic cylinder; 424, forming rod; 4241, forming notch;

[0030] 50, ejector plate; 501, ejector pin;

[0031] 60, bottom plate; 601, ejector pin;

[0032] 70. Bracket; 701. Inverted. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] Example

[0037] Figure 1-2 The bracket 70 shown has circular grooves at both ends, a fixing portion is provided on one side of the bracket 70 close to the circular groove, and an undercut 701 is provided on the inner side wall of the fixing portion.

[0038] Reference Figure 3-5As shown, the utility model discloses a plastic part undercut 701 core-pulling ejection linkage mold structure, including a panel 10, a pad 20, a movable mold plate 30, a fixed mold plate 40, an ejector plate 50 and a bottom plate 60 from top to bottom, a fixed mold core 401 is embedded in the fixed mold plate 40, a movable mold core 301 is embedded in the movable mold plate 30, the movable mold core 301 is provided with an upper molding groove 3011, and the fixed mold core 401 is provided with a lower molding groove 4012. The fixed mold core 40 is provided with a first mold core 401 on both sides of the fixed mold core 401. Side withdrawal mechanism 41 and second side withdrawal mechanism 42; specifically, when the mold is closed, the movable mold plate 30 and the fixed mold plate 40 are closed, the movable mold core 301 and the fixed mold core 401 are closed, the upper molding groove 3011 and the lower molding groove 4012 are closed to form the molding cavity of the main body of the molding bracket 70, the first side withdrawal mechanism 41 and the second side withdrawal mechanism 42 are close to the molding cavity, the first side withdrawal mechanism 41 is used for the circular groove at one end of the molding bracket 70, and the second side withdrawal mechanism 42 is used for the circular groove at the other end of the molding bracket 70.

[0039] Reference Figure 4 , 6 As shown in Figures 8 and 9, the first side extraction mechanism 41 includes a first side slider 411, and a molding needle 4111 is arranged on the end surface of the first side slider 411 facing the fixed mold core 401; specifically, when the mold is closed, the guide column of the movable mold plate 30 drives the first side slider 411 to approach the fixed mold core 401, and the molding needle 4111 is sent into the molding cavity. Furthermore, a guide block 4011 is further installed on the side of the fixed mold core 401 close to the first side slider 411, and the guide block 4011 is provided with a plurality of guide holes, and the molding needle 4111 passes through the guide holes. The setting of the guide block 4011 ensures that the molding needle 4111 will not deviate when entering or leaving the molding cavity, and the first side slider 411 drives the molding needle 4111 to move smoothly.

[0040] Reference Figure 4 , 6-7, the second side withdrawal mechanism 42 includes a second side slider 421 and a push block 422, a hydraulic cylinder 423 on the side of the fixed mold 40, the piston rod of the hydraulic cylinder 423 is connected to the second side slider 421, and the hydraulic cylinder 423 controls the second side slider 421 to approach or leave the fixed mold core 401; the second side slider 421 has a stepped elliptical groove 4211 on the end face facing the fixed mold core 401, and a forming rod 424 is installed in the elliptical groove 4211, one end of the forming rod 424 can be slid up and down and placed in the elliptical groove 4211, and the other end can be slidably passed through the push block 422 and placed on the fixed mold core 401, and the forming rod 424 extends to the fixed mold core 401. A forming notch 4241 is opened on the side of one end, and a plurality of push rods 501 are installed on the ejector plate 50, and the push rods 501 can slide upward through the fixed mold core 40 to connect to the push block 422. Specifically, when the mold is closed, the second side slider 421 pushes the side of the molding rod 424 with the molding notch 4241 to pass through the top block 422 and be placed in the molding cavity. The molding notch 4241 is used to form the undercut 701 of the molding bracket 70. The top block 422 has a plurality of through holes, and a sleeve 4221 is embedded in the through hole. The molding rod 424 can slide through the sleeve 4221. The setting of the sleeve 4221 facilitates the molding rod 424 to pass through the top block 422 and slide smoothly. When the mold is opened, the ejector plate 50 pushes the ejector 501 upward to push the ejector block 422, driving the molding rod 424 to move upward with the bracket 70, and the bracket 70 leaves the fixed mold core 401, so that the fixed part of the bracket 70 has sufficient deformation space, and then the hydraulic cylinder 423 is controlled to drive the second side slider 421 to drive the molding rod 424 to be pulled out from between, so as to realize the demoulding of the undercut 701.

[0041] Furthermore, limit switches 402 are further installed on both sides of the second side slider 421 on the fixed mold plate 40, and the limit switches 402 are used to limit the two extreme positions of the movement of the second side slider 421 for opening and closing the mold to ensure that the molding rod 424 moves into place.

[0042] Reference Figure 6 As shown, a plurality of ejector pins 601 are further provided on the ejector plate 50 , and the ejector pins 601 can slide upward through the fixed mold plate 40 and the fixed mold core 401 . Specifically, the ejector plate 50 pushes the ejector rod 501 upward and at the same time pushes the ejector pins 601 to push the bracket 70 upward, and the auxiliary bracket 70 is ejected from the fixed mold core 401 .

[0043] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A plastic part undercut core-pulling ejection linkage strong demoulding structure, characterized by: It comprises a panel, a backing plate, a movable die plate, a fixed die plate, an ejector plate and a bottom plate from top to bottom, the fixed die plate is embedded with a fixed die core, the movable die plate is embedded with a movable die core, the movable die core is provided with an upper forming groove, the fixed die core is provided with a lower forming groove, and the fixed die plate is provided with a first side extraction mechanism and a second side extraction mechanism on both sides of the fixed die core; The first side-drawing mechanism comprises a first side slider, and the first side slider is provided with a molding needle on the end surface facing the fixed mold core; The second side-drawing mechanism includes a second side slider and a push block. The second side slider is provided with a stepped elliptical groove on the end surface facing the fixed mold core. A forming rod is installed in the elliptical groove. One end of the forming rod can be slid up and down and placed in the elliptical groove, and the other end can be slidably passed through the push block and placed on the fixed mold core. The forming rod extends to the fixed mold core and has a forming notch on the side surface of one end. A plurality of push rods are installed on the ejector plate. The push rods can slide upward through the fixed mold plate to connect to the push block.

2. The plastic part undercut core-pulling ejection linkage strong mold release structure according to claim 1 is characterized in that: The ejector plate is further provided with a plurality of ejectors, and the ejectors can slide upward through the fixed mold plate and the fixed mold core.

3. The plastic part undercut core-pulling ejection linkage strong mold release structure according to claim 1, characterized in that: The top block is provided with a plurality of through holes, sleeves are embedded in the through holes, and the forming rod can slide through the sleeves.

4. The plastic part undercut core-pulling ejection linkage strong mold release structure according to claim 1, characterized in that: The second side withdrawal mechanism further includes a hydraulic cylinder installed on the side of the fixed template, and the piston rod of the hydraulic cylinder is connected to the second side sliding block.

5. The plastic part undercut core-pulling ejection linkage strong mold release structure according to claim 1, characterized in that: Limit switches are further installed on the fixed template at both sides of the second side sliding block.

6. The plastic part undercut core-pulling ejection linkage strong mold release structure according to claim 1, characterized in that: A guide block is further installed on a side of the fixed mold core close to the first side slide block, and the guide block is provided with a plurality of guide holes, and the molding needle passes through the guide holes.

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