A core-pulling module of a plastic forming mold

Abstract

The present application relates to a kind of core-pulling module of plastic forming die, including inclined top module, inclined top module includes U-shaped seat block, the directional plate of transverse fixed at the top opening of U-shaped seat block, oblique square column is connected in the directional plate and is active, and the traction strip that is transverse and is arranged in the inside of U-shaped seat block to have front and rear translation function and is connected with the lower end of oblique square column;Inclined top module further includes rotatable connection in the inside rear side of U-shaped seat block transmission gear and rotatable connection in the inside of U-shaped seat block and meshing in the front upper of transmission gear reversing gear;Inclined top module further includes vertical arrangement and meshing in the rear of transmission gear driving rack;The present application reduces both the complexity of the structure of mould, and the processing and manufacturing difficulty of mould, to reach the effect of time-saving and labor-saving and reduce manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, and more particularly to a core-pulling module for a plastic molding die. Background Technology

[0002] Plastic molding dies are key process equipment used to give plastic materials specific shapes and precise dimensions to achieve mass production. Their core principle is to replicate the final form of plastic products through the cavity of the mold. The core-pulling mechanism is a key mechanism in plastic molding dies used to solve the problem that plastic parts cannot be directly demolded. Before the mold is opened, the movable core (or block) must be pulled away from the moving template or moving mold core in order to complete the demolding of the plastic parts.

[0003] In most existing core-pulling mechanisms, the core moves laterally. To drive it, a hydraulic cylinder providing the driving force can be fixed to the side of the moving mold plate. However, in some core-pulling mechanisms, the core moves vertically. Conventional inclined ejector structures can only drive the core to move laterally. Therefore, a hydraulic cylinder must be added to the bottom of the fixed mold plate to drive the core to move vertically. However, since the bottom of the fixed mold plate also has a base plate and ejection mechanism, it is difficult for the added hydraulic cylinder to avoid some of the ejector pins in the ejection mechanism. A transmission mechanism that works in conjunction with the cylinder must be added to move the hydraulic cylinder. This increases the structural complexity of the mold, the processing and manufacturing difficulty of the mold, and is both time-consuming and labor-intensive, as well as increasing the manufacturing cost. A solution is urgently needed. Summary of the Invention

[0004] In view of the current state of the prior art, the technical problem to be solved by the present invention is to provide a core-pulling module for plastic molding molds that reduces the structural complexity of the mold and the difficulty of processing and manufacturing the mold, thereby achieving the effect of saving time and effort and reducing manufacturing costs.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a core-pulling module for a plastic molding die, characterized in that it includes an inclined top module, the inclined top module including a U-shaped seat block, a directional plate laterally fixed at the top opening of the U-shaped seat block, an inclined square column inclined and movably connected in the directional plate, and a traction bar laterally and movably disposed inside the U-shaped seat block to have a forward and backward translation function and connected to the lower end of the inclined square column.

[0006] The front end of the traction bar is provided with a first limiting groove. The lower end of the rhomboid column is movably inserted into the first limiting groove. A straight guide groove is provided on the inner wall of both sides of the first limiting groove. A symmetrically distributed straight guide groove is provided between the front end of the two straight guide grooves and the front outer wall of the traction bar. A symmetrically distributed oblique opening groove is provided between the front end of the two straight guide grooves and the front outer wall of the traction bar. The two oblique opening grooves are set with the front lower and the rear higher. The width of the oblique opening groove is equal to the width of the straight guide groove.

[0007] On the lower left and right outer walls of the rhomboid column, there is a horizontally arranged and symmetrically distributed guide pin. The end of each guide pin is movably embedded in a straight guide groove or an oblique opening groove on the same side.

[0008] A positioning notch is provided at the rear corner of the upper end of the rhomboid column to form a positioning block on the front side of the upper end of the rhomboid column, and a limiting slope is formed on the inner wall of the front side of the positioning notch.

[0009] Preferably, the inclined top module further includes a transmission gear rotatably connected to the rear side of the U-shaped seat block and a reversing gear rotatably connected to the inside of the U-shaped seat block and meshing with the transmission gear in front of and above the transmission gear, the rear part of the transmission gear extending to the rear end of the U-shaped seat block.

[0010] Preferably, the inclined top module further includes a drive rack that is vertically arranged and meshes with the rear of the transmission gear.

[0011] Preferably, the rear end of the traction bar has a transverse extension bar positioned above the reversing gear, and the lower outer wall of the extension bar has a transversely arranged straight tooth surface, which meshes with the upper part of the reversing gear.

[0012] Preferably, the end of the extension bar is further provided with a second limiting groove, the width of which matches the width of the active rack.

[0013] Preferably, two core blocks are formed forward on the front outer wall of the traction bar, which are respectively symmetrically arranged on the left and right sides of the first limiting groove and located below the front opening of the two oblique opening grooves.

[0014] Preferably, each of the two core blocks has a symmetrically arranged molding arc surface on its end outer wall, and each of the two molding arc surfaces also has a transversely arranged core column formed forward.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] This invention eliminates the need for an oil cylinder at the bottom of the moving mold plate. The oblique column can be driven to tilt up and down by the movement of the moving mold core in the forming mold. It can also avoid some of the ejector pins in the ejection mechanism located below the moving mold plate. This reduces the structural complexity of the mold and the difficulty of processing and manufacturing the mold, thereby achieving the effect of saving time and effort and reducing manufacturing costs. Attached Figure Description

[0017] The above and other features, advantages, and aspects of the embodiments of this application will become more apparent when taken in conjunction with the accompanying drawings and the following detailed description; throughout the drawings, the same or similar reference numerals denote the same or similar elements; it should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale; in the drawings:

[0018] Figure 1 This is an exploded top view of the left front side of the present invention;

[0019] Figure 2 This is an exploded top view of the left front side of the sloping top module of the present invention;

[0020] Figure 3 This is an exploded top view of the left front side of the side forming module of the present invention;

[0021] Figure 4 For the present invention Figure 1 A magnified view of the structure at point A. Detailed Implementation

[0022] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. The term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0023] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0024] like Figures 1-4As shown, a core-pulling module for a plastic molding die includes an inclined top module 1. The inclined top module 1 includes a U-shaped seat block 11, a directional plate 12 laterally fixed at the top opening of the U-shaped seat block 11, an inclined square column 13 inclined and movably inserted in the directional plate 12, and a traction bar 14 laterally and movably disposed inside the U-shaped seat block 11 to have a forward and backward translation function and connected to the lower end of the inclined square column 13.

[0025] A first limiting groove 141 is provided at the middle of the front end of the traction bar 14. The lower end of the rhomboid column 13 is movably inserted into the first limiting groove 141. A straight guide groove 142 is provided on the inner walls of the left and right sides of the first limiting groove 141. A symmetrically distributed oblique opening groove 143 is provided between the front end of the two straight guide grooves 142 and the front outer wall of the traction bar 14. The two oblique opening grooves 143 are both set with the front lower and the rear higher. The width of the oblique opening groove 143 is equal to the width of the straight guide groove 142.

[0026] On the lower left and right outer walls of the rhomboid column 13, there is a horizontally arranged and symmetrically distributed guide pin 131. The end of each guide pin 131 is movably embedded in a straight guide groove 142 or an oblique opening groove 143 on the same side.

[0027] A positioning notch 132 is provided at the rear corner of the upper end of the rhomboid prism 13 to form an alignment block 134 on the front side of the upper end of the rhomboid prism 13. A limiting slope 133 is formed on the inner wall of the front side of the positioning notch 132.

[0028] The inclined top module 1 also includes a transmission gear 15 rotatably connected to the rear side inside the U-shaped seat block 11 and a reversing gear 16 rotatably connected to the inside of the U-shaped seat block 11 and meshing with the front and upper part of the transmission gear 15. The rear part of the transmission gear 15 extends to the rear end of the U-shaped seat block 11.

[0029] The inclined top module 1 also includes a drive rack 17 that is vertically arranged and meshes with the rear of the transmission gear 15.

[0030] The rear end of the traction bar 14 forms a transverse extension bar 144 above the reversing gear 16. A transversely arranged straight tooth surface 146 is formed on the lower outer wall of the extension bar 144, and the straight tooth surface 146 meshes with the upper part of the reversing gear 16.

[0031] The end of the extension bar 144 is also provided with a second limiting groove 145, the width of which matches the width of the active rack 17.

[0032] Two core blocks 147 are also formed on the front outer wall of the traction bar 14, which are symmetrically arranged on the left and right sides of the first limiting groove 141 and located below the front opening of the two oblique opening grooves 143.

[0033] Each of the two core blocks 147 has a symmetrically arranged molding arc surface 148 on its end outer wall, and each of the two molding arc surfaces 148 also has a horizontally arranged core column 149 formed forward.

[0034] A core-pulling module for a plastic molding die further includes a main molding module 2 located in front of an inclined top module 1. The main molding module 2 includes a main molding slider 21, a main molding cylinder 22 located in front of the main molding slider 21, a first core-pulling unit located inside the main molding slider 21, and two second core-pulling units located inside the main molding slider 21 and symmetrically distributed. The telescopic end of the main molding cylinder 22 is arranged laterally and rearward and fixed on the main molding slider 21.

[0035] The first core-pulling unit includes a first guide slider 25 movably embedded in the main molding slider 21 to have the function of moving back and forth relative to the main molding slider 21, and two first core-pulling rods 26 that are laterally and movably connected in the main molding slider 21 to have the function of tilting back and forth and are symmetrically arranged left and right. The top of the first guide slider 25 forms a vertically arranged first seat block 251, and the rear ends of the two first core-pulling rods 26 are movably connected to the upper edge of the first seat block 251 to have the function of translating left and right.

[0036] The second core-pulling unit includes a second guide slider 23 movably embedded in the main molding slider 21 to have the function of moving back and forth relative to the main molding slider 21, two second core-pulling rods 27 that are laterally and movably connected in the main molding slider 21 to have the function of tilting forward and backward and are arranged symmetrically up and down, and two third core-pulling rods 24 that are laterally and movably connected in the main molding slider 21 to have the function of tilting forward and backward and are arranged symmetrically up and down. The top of the second guide slider 23 forms a vertically arranged second seat block 231. The rear ends of the two second core-pulling rods 27 are movably connected to the left edge of the second seat block 231 to have the function of vertical movement up and down, and the rear ends of the two second core-pulling rods 27 are movably connected to the right edge of the second seat block 231 to have the function of vertical movement up and down.

[0037] A core-pulling module for a plastic molding die further includes two side molding modules 3 symmetrically arranged on the left and right sides of the inclined top module 1. The side molding module 3 includes a side molding slider 31, a side molding cylinder 32 arranged outside the side molding slider 31, a third guide slider 33 movably embedded in the side molding slider 31 to have the function of relative movement with the side molding slider 31, and two fourth core-pulling rods 34 that are laterally and movably connected in the side molding slider 31 to have the function of forward and backward tilting movement and are symmetrically arranged vertically. The telescopic end of the side molding cylinder 32 is arranged laterally and towards the side molding module 3 and fixed on the side molding module 3.

[0038] The top of the third guide slider 33 has a vertically arranged third seat block 331, and the end of the third seat block 331 has a vertically distributed guide opening groove 332. The outer ends of the two fourth core pull rods 34 are movably inserted and connected in the guide opening groove 332 so that they both have the function of vertical movement up and down.

[0039] Working principle:

[0040] The main forming slider 21 in the main forming module 2 is movably connected to the top of the fixed template 4 to enable it to move forward and backward and is located in front of the fixed mold core 5. The main forming cylinder 22 is fixed to the front outer wall of the fixed template 4. The bottom of the first guide slider 25 and each second guide slider 23 are elastically fixed to the top of the fixed template 4.

[0041] The side forming sliders 31 in the two side forming modules 3 are movably connected to the top of the fixed template 4 to enable forward and backward translation and are located on the left and right sides of the fixed mold core 5 respectively. The two side forming cylinders 32 are fixed to the left and right outer walls of the fixed template 4 respectively, and each third guide slider 33 is elastically fixed to the top of the fixed template 4.

[0042] A semi-circular boss 51 is formed on the top of the fixed mold core 5. A circular cavity 53 is also provided on the top of the fixed mold core 5 in front of the semi-circular boss 51. A structural groove 52 is provided on the middle edge of the front side of the semi-circular boss 51. The inclined ejector module 1 is embedded in the structural groove 52 and the upper end of the active rack 17 in the inclined ejector module 1 is fixed on the moving mold core (not shown). The moving template (not shown) in the plastic molding die is driven to move towards the fixed template 4 until the end faces of the two are engaged. At this time, the end face of the moving mold core (not shown) located inside the end face of the moving template (not shown) is also engaged with the end face of the fixed mold core 5.

[0043] During the movement, the moving mold core (not shown) will drive the active rack 17 in the inclined top module 1 to move downward, thereby inserting the lower end of the active rack 17 into the interior of the structural groove 52. Through the meshing relationship between the active rack 17 and the transmission gear 15, the transmission gear 15 will be driven to rotate. In turn, through the meshing relationship between the transmission gear 15 and the reversing gear 16, the reversing gear 16 will be driven to rotate. Through the meshing relationship between the reversing gear 16 and the straight tooth surface 146 on the extension bar 144, the traction bar 14 will be driven to move forward.

[0044] In the initial state, the end of each guide pin 131 is movably embedded in a slanted opening groove 143 on the same side. When the traction bar 14 moves forward, since the rhomboid post 13 cannot move back and forth, the end of each guide pin 131 will move into a straight guide groove 142 on the same side, thereby gradually raising the ends of the two guide pins 131, thereby pushing the upper end of the rhomboid post 13 to tilt forward and upward, thereby causing the alignment block 134 on the rhomboid post 13 to be inserted into the cavity located inside the moving mold core (not shown), and the limiting inclined surface 133 is attached to the rear inner wall of the cavity.

[0045] Prior to this, the protrusions on the moving mold core (not shown) have been inserted into the interior of the circular cavity 53; as the traction bar 14 moves forward, both core blocks 147 pass through the arc-shaped slots 54 provided on the rear inner wall of the circular cavity 53 and extend into the interior of the circular cavity 53, so that both cores 149 are inserted into the interior of the rear side of the protrusions to complete the alignment and forming.

[0046] Then, the telescopic end of the main forming cylinder 22 in the main forming module 2 extends outward to drive the main forming slider 21 to move backward until the forming arc surface 211 on the rear outer wall of the main forming slider 21 reaches the front of the front arc surface outer wall of the semi-circular boss 51. During the above process, the front ends of the first core pulling rod 26 in the first core pulling unit will move closer to each other as it moves forward with the main forming slider 21. The front ends of the two second core pulling rods 27 and the two third core pulling rods 24 in each second core pulling unit will move up and down relative to each other while moving forward to move closer to each other.

[0047] Similarly, it is also necessary to drive the telescopic ends of the side forming cylinders 32 in each side forming module 3 to extend outward so that each side forming slider 31 moves toward the fixed mold core 5, thereby driving the inner ends of the two fourth core pulling rods 34 to move up and down relative to each other in the process of moving synchronously with the side forming sliders 31.

[0048] Finally, the molten material is injected into the mold cavity between the moving mold core (not shown) and the fixed mold core 5 through the gate in the moving mold plate (not shown) and the runner in the moving mold core (not shown) to complete the injection molding. After cooling, a plastic part is formed (prior art).

[0049] After molding is completed, the telescopic ends of the main molding cylinder 22 and each side molding cylinder 32 are first driven to retract inward to drive the main molding slider 21, the front end of each first core-pulling rod 26, the front end of each second core-pulling rod 27, the front end of each third core-pulling rod 24, and the inner end of each fourth core-pulling rod 34 to move in the opposite direction to reset. Then the moving template (not shown) can be driven to leave the fixed template 4. During this process, the active rack 17 moves upward with the fixed mold core 5, and then, in the same way, drives the traction bar 14 to move backward by means of the transmission gear 15 and the reversing gear 16, thereby driving the upper end of the rhomboid column 13 to move backward and downward, thereby causing the alignment block 134 on the rhomboid column 13 to leave the cavity located inside the moving mold core (not shown), and at the same time, the two core columns 149 also move in the opposite direction to complete the core pulling.

[0050] This invention eliminates the need for an oil cylinder at the bottom of the moving template. The oblique column 13 can be driven to tilt up and down by the movement of the moving mold core in the forming mold. It can also avoid some of the ejector pins in the ejection mechanism located below the moving template. This reduces the structural complexity of the mold and the difficulty of processing and manufacturing the mold, thereby achieving the effect of saving time and effort and reducing manufacturing costs.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A core-drawing module of a plastic molding mold, characterized by, The system includes a sloping top module, which includes a U-shaped base block, a directional plate horizontally fixed at the top opening of the U-shaped base block, an inclined column that is inclined and movably connected in the directional plate, and a traction bar that is horizontally and movably disposed inside the U-shaped base block to have a forward and backward translation function and is connected to the lower end of the inclined column. The front end of the traction bar is provided with a first limiting groove. The lower end of the rhomboid column is movably inserted into the first limiting groove. A straight guide groove is provided on the inner wall of both sides of the first limiting groove. A symmetrically distributed straight guide groove is provided between the front end of the two straight guide grooves and the front outer wall of the traction bar. A symmetrically distributed oblique opening groove is provided between the front end of the two straight guide grooves and the front outer wall of the traction bar. The two oblique opening grooves are set with the front lower and the rear higher. The width of the oblique opening groove is equal to the width of the straight guide groove. On the lower left and right outer walls of the rhomboid column, there is a horizontally arranged and symmetrically distributed guide pin. The end of each guide pin is movably embedded in a straight guide groove or an oblique opening groove on the same side. A positioning notch is provided at the rear corner of the upper end of the rhomboid column to form a positioning block on the front side of the upper end of the rhomboid column, and a limiting slope is formed on the inner wall of the front side of the positioning notch. The inclined top module also includes a transmission gear rotatably connected to the rear side of the U-shaped seat block and a reversing gear rotatably connected to the U-shaped seat block and meshing with the transmission gear in front of and above the transmission gear. The rear part of the transmission gear extends to the outside of the rear end of the U-shaped seat block. The inclined top module also includes a drive rack that is vertically arranged and meshes with the rear of the transmission gear; The rear end of the traction bar forms a transverse extension bar above the reversing gear, and a transversely arranged straight tooth surface is formed on the lower outer wall of the extension bar, which meshes with the upper part of the reversing gear. The end of the extension bar is also provided with a second limiting groove, the width of which is matched with the width of the active rack. Two core blocks are also formed on the front outer wall of the traction bar, which are symmetrically arranged on the left and right sides of the first limiting groove and located below the front opening of the two inclined grooves. Each of the two core blocks has a symmetrically arranged shaped arc surface on its end outer wall, and each of the two shaped arc surfaces also has a transversely arranged core column formed forward.

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