Ejector pin machining die capable of preventing ejector pin from being bent

Abstract

The utility model discloses an ejector pin processing mould capable of preventing an ejector pin from bending, and relates to the technical field of moulds, in particular to an ejector pin processing mould capable of preventing the ejector pin from bending, which comprises a mould body and is used for performing injection molding on a workpiece. The positioning columns are fixed to the four corners of the top of the lower die head, the upper die base is slidably mounted at the upper end of the lower die head, the balance rods are fixed to the four corners in the lower die base, the guide plate is slidably mounted in the lower die base through the balance rods, the ejector pins are mounted in the guide plate, and the mounting heads are fixed to the four corners of the bottom of the lower die head. The demolding assembly comprises guide frames fixed to the two sides of the bottom of the guide plate, air cylinders installed at the two ends of the lower mold base and guide rods installed at the output ends of the air cylinders. The automatic demolding device has the advantages of high efficiency, accuracy, safety and the like, and can be widely applied to actual production.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an ejector pin processing mold which can prevent the ejector pin from bending. Background Art

[0002] A mold is a mold that is used to produce the desired product through molding methods such as injection molding, blow molding, and die casting. It is widely used in the production of extrusion, powder metallurgy, plastics, rubber, and ceramic products. Its main function is to shape the blank inside the mold into a specific shape and size through external force. The ejector is a component that ejects the product from the mold and helps the product to be demolded.

[0003] After checking the publication number: CN214082634U, a mold spring ejector structure is disclosed. This technology discloses "a mold spring ejector structure, including a lower mold, a lower template and an ejector plate, the upper surface of the ejector plate is provided with two circular through holes, and the hole walls of the circular through holes are movably connected with a guide column, the upper surface of the guide column is fixedly connected to the lower surface of the lower mold, the outer wall of the guide column is movably sleeved with a return spring, the outer wall of the ejector plate is provided with two connecting through holes, the hole walls of the connecting through holes are movably connected with an ejector, the lower surface of the ejector is provided with a threaded hole, the outer wall of the bottom end of the connecting through hole is movably connected with a hexagon socket bolt, and the outer wall of the hexagon socket bolt is threadedly connected to the threaded hole at the bottom of the ejector" and other technical solutions, which have "improved the versatility of the mold spring ejector structure, improved the convenience of mold manufacturing, and reduced the cost of mold manufacturing, and the baffle can prevent the bottom of the ejector from shaking and being squeezed and bent, and improve the protection ability of the ejector" and other technical effects;

[0004] The above solution uses a spring to drive an ejector pin for demolding. However, the spring force is usually fixed and cannot be adjusted according to actual needs. This may result in insufficient force from the ejector pin to completely eject the workpiece in some cases, resulting in incomplete demolding. In other cases, the ejector pin may exert excessive force, potentially damaging or deforming the workpiece. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the utility model provides a pin processing mold that prevents the pin from bending. The molded workpiece is automatically demolded through the demoulding component. It has the advantages of high efficiency, accuracy, and safety, and can be widely used in actual production.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A mold for processing an ejector pin that prevents the ejector pin from bending, comprising a mold body and used for injection molding a workpiece, the mold body comprising:

[0007] The main assembly includes a lower die head mounted on the top of the lower die base, positioning columns fixed at the four corners of the top of the lower die head, an upper die base slidably mounted on the upper end of the lower die head, a balancing rod fixed at the four corners inside the lower die base, a guide plate slidably mounted inside the lower die base via the balancing rod, an ejector pin mounted in the guide plate, and a mounting head fixed at the four corners of the bottom of the lower die head;

[0008] The demoulding assembly includes a guide frame fixed on both sides of the bottom of the guide plate, a cylinder installed at both ends of the lower mold base, a guide rod installed at the output end of the cylinder, and the other end of the guide rod is slidably mounted on the guide frame;

[0009] The mounting assembly includes mounting cavities opened in both ends of the lower die base.

[0010] Preferably, the mounting assembly also includes a gear rotatably mounted in the center of the mounting cavity, a cross bar fixed at both upper and lower ends of the mounting cavity, a rack slidably mounted on the cross bar, a mounting pin fixed at one end of the rack, mounting holes opened at the four corners of the top of the lower mold base, and the mounting holes cooperate with the mounting head, and a spring mounted on the cross bar.

[0011] Preferably, the mounting assembly further comprises a shift rod fixed to the outer end of the gear, and the gear is meshed with racks at both ends for transmission.

[0012] Preferably, the demoulding assembly further comprises an oblique groove provided inside the guide frame, and the guide frame is slidably connected to the guide rod via the oblique groove.

[0013] Preferably, the main body assembly further comprises a hexagonal screw head threadedly mounted on the lower end of the guide plate, and the hexagonal screw head is used to fix the ejector pin on the guide plate.

[0014] Preferably, the ejector pins are installed through the lower die head, and the ejector pins are distributed at the four corners of the punch on the lower die head.

[0015] Beneficial effects

[0016] The utility model provides a thimble processing mold that prevents thimble bending. Compared with the existing technology, it has the following advantages:

[0017] (1) When the upper die base is separated from the lower die head for demoulding, the guide rod is driven by the output end of the cylinder to drive the guide frame, and the guide frame drives the guide plate to move vertically upward along the balance bar. At the same time, the guide plate drives the ejector pin to lift the workpiece on the lower die head for demoulding.

[0018] (2) The gear is rotated by toggling the lever, and the gear drives the mounting pin to disengage from the mounting hole through the rack, so that the mounting head on the lower die head can be inserted into the mounting hole. Then the toggled lever is released and the rack is pushed to slide along the cross bar by the pressure of the spring rebound. At the same time, the rack drives the mounting pin to extend into the mounting hole and insert into the mounting head, restricting the mounting head in the mounting hole, thereby fixing the lower die head on the lower die base, making it easy to disassemble and replace the lower die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a structural diagram of the lower die base in the utility model;

[0021] Figure 3 This is a schematic diagram of the split structure of the lower die base in the utility model;

[0022] Figure 4 This is a schematic diagram of the partial cross-sectional structure of the lower die base of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the guide plate in the utility model.

[0024] In the figure: 1. Mold body; 11. Main assembly; 111. Lower mold base; 112. Lower mold head; 113. Positioning column; 114. Upper mold base; 115. Balance bar; 116. Guide plate; 117. Ejector pin; 118. Hexagon socket screw head; 119. Mounting head; 12. Demolding assembly; 121. Guide frame; 122. Cylinder; 123. Guide rod; 13. Mounting assembly; 131. Mounting cavity; 132. Gear; 133. Cross bar; 134. Rack; 135. Mounting pin; 136. Mounting hole; 137. Push rod; 138. Spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-5 The utility model provides a technical solution for a thimble processing mold for preventing thimble bending: a thimble processing mold for preventing thimble bending, comprising a mold body 1 and used for injection molding a workpiece, the mold body 1 comprising:

[0027] The main assembly 11 includes a lower die head 112 mounted on the top of the lower die base 111, positioning posts 113 fixed at the four corners of the top of the lower die head 112, an upper die base 114 slidably mounted on the upper end of the lower die head 112, a balancing rod 115 fixed at the four corners of the lower die base 111, a guide plate 116 slidably mounted inside the lower die base 111 via the balancing rod 115, an ejector pin 117 installed in the guide plate 116, and a mounting head 119 fixed at the four corners of the bottom of the lower die head 112;

[0028] The demoulding assembly 12 includes a guide frame 121 fixed on both sides of the bottom of the guide plate 116, a cylinder 122 installed at both ends of the lower mold base 111, and a guide rod 123 installed at the output end of the cylinder 122. The other end of the guide rod 123 is slidably mounted on the guide frame 121;

[0029] The mounting assembly 13 includes mounting cavities 131 formed in both ends of the lower mold base 111 .

[0030] In this embodiment, when the upper mold base 114 is separated from the lower mold head 112 for demolding, the guide rod 123 is driven by the output end of the cylinder 122 to drive the guide frame 121, and the guide frame 121 drives the guide plate 116 to move vertically upward along the balance rod 115. At the same time, the guide plate 116 drives the ejector pin 117 to lift the workpiece on the lower mold head 112 for demolding.

[0031] Specifically, the mounting assembly 13 also includes a gear 132 rotatably mounted in the center of the mounting cavity 131, a cross bar 133 fixed at both upper and lower ends of the mounting cavity 131, a rack 134 slidably mounted on the cross bar 133, a mounting pin 135 fixed at one end of the rack 134, mounting holes 136 opened at the four corners of the top of the lower mold base 111, and the mounting holes 136 cooperate with the mounting head 119, and a spring 138 is mounted on the cross bar 133.

[0032] In this embodiment, the gear 132 is driven to rotate by toggling the toggle lever 137, and the gear 132 drives the mounting pin 135 to disengage from the mounting hole 136 through the rack 134, so that the mounting head 119 on the lower die head 112 can be inserted into the mounting hole 136. Then the toggle lever 137 is released and the rebound pressure of the spring 138 pushes the rack 134 to slide along the cross bar 133. At the same time, the rack 134 drives the mounting pin 135 to extend into the mounting hole 136 and insert it into the mounting head 119, restricting the mounting head 119 in the mounting hole 136, thereby fixing the lower die head 112 on the lower die base 111, making it easy to disassemble and replace the lower die head 112.

[0033] Specifically, the mounting assembly 13 further includes a shifting rod 137 fixed to the outer end of the gear 132 , and the gear 132 is meshed with the racks 134 at both ends for transmission.

[0034] In this embodiment, when the gear 132 rotates, it can drive the racks 134 at both ends to move synchronously in opposite directions.

[0035] Specifically, the demoulding assembly 12 further includes an oblique groove provided inside the guide frame 121 , and the guide frame 121 is slidably connected to the guide rod 123 via the oblique groove.

[0036] In this embodiment, the guide rod 123 can drive the guide frame 121 to move longitudinally when it moves transversely.

[0037] Specifically, the main body assembly 11 further includes a hexagonal screw head 118 threadedly mounted on the lower end of the guide plate 116 , and the hexagonal screw head 118 is used to fix the ejector pin 117 on the guide plate 116 .

[0038] In this embodiment, the ejector pin 117 can be easily disassembled and replaced from the guide plate 116 .

[0039] Specifically, the ejector pins 117 are installed through the lower die head 112 , and the ejector pins 117 are distributed at the four corners of the punch on the lower die head 112 .

[0040] In this embodiment, the ejector pins 117 are distributed as symmetrically and evenly as possible around the punch to ensure the balance of the demoulding force and prevent the workpiece from being deformed or damaged.

[0041] The working principle and use process of the present invention are as follows: first, the gear 132 is driven to rotate by toggling the toggle lever 137, and the gear 132 drives the mounting pin 135 to disengage from the mounting hole 136 through the rack 134, so that the mounting head 119 on the lower die head 112 can be inserted into the mounting hole 136. Then, the toggled toggle lever 137 is released and the rebound pressure of the spring 138 pushes the rack 134 to slide along the cross bar 133. At the same time, the rack 134 drives the mounting pin 135 to extend into the mounting hole 136 and then insert into the mounting head 119, restricting the mounting head 119 in the mounting hole 136, thereby fixing the lower die head 112 on the lower die base 111.

[0042] After the lower die head 112 on the lower die base 111 is closed with the upper die base 114, injection is performed through the injection port on the upper die base 114. After the workpiece is formed, the upper die base 114 is separated from the lower die head 112, and then the guide rod 123 is driven by the output end of the cylinder 122 to drive the guide frame 121. The guide frame 121 drives the guide plate 116 to move vertically upward along the balance bar 115. At the same time, the guide plate 116 drives the ejector pin 117 to lift the workpiece on the lower die head 112 for demoulding.

[0043] The model of the cylinder is DSNU-20-50-PPV-A. As it adopts existing mature technology, it will not be elaborated in detail here. The electrical components appearing in this article are all connected to the external main controller and 220V AC power.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ejector pin processing mold for preventing ejector pin bending, characterized by: The invention comprises a mold body (1) and is used for injection molding a workpiece, wherein the mold body (1) comprises: The main body component (11) includes a lower die head (112) mounted on the top of the lower die base (111), positioning columns (113) fixed at the four corners of the top of the lower die head (112), an upper die base (114) slidably mounted on the upper end of the lower die head (112), a balance rod (115) fixed at the four corners inside the lower die base (111), a guide plate (116) slidably mounted inside the lower die base (111) through the balance rod (115), an ejector pin (117) mounted in the guide plate (116), and a mounting head (119) fixed at the four corners of the bottom of the lower die head (112); The demoulding assembly (12) includes a guide frame (121) fixed on both sides of the bottom of the guide plate (116), a cylinder (122) installed at both ends of the lower mold base (111), a guide rod (123) installed at the output end of the cylinder (122), and the other end of the guide rod (123) is slidably mounted on the guide frame (121); The mounting assembly (13) includes mounting cavities (131) provided inside both ends of the lower die base (111).

2. The ejector pin processing mold for preventing ejector pin bending according to claim 1, characterized in that: The mounting assembly (13) further includes a gear (132) rotatably mounted in the center of the mounting cavity (131), a crossbar (133) fixed at both upper and lower ends of the mounting cavity (131), a rack (134) slidably mounted on the crossbar (133), a mounting pin (135) fixed at one end of the rack (134), mounting holes (136) provided at four corners of the top of the lower die base (111), the mounting holes (136) being matched with the mounting head (119), and a spring (138) sleeved and mounted on the crossbar (133).

3. The ejector pin processing mold for preventing ejector pin bending according to claim 1, characterized in that: The mounting assembly (13) further comprises a shifting rod (137) fixed to the outer end of the gear (132), and the gear (132) is meshed with the racks (134) at both ends for transmission.

4. The ejector pin processing mold for preventing ejector pin bending according to claim 1, characterized in that: The demoulding assembly (12) further comprises an inclined groove provided inside the guide frame (121), and the guide frame (121) is slidably connected to the guide rod (123) via the inclined groove.

5. The ejector pin processing mold for preventing ejector pin bending according to claim 1, characterized in that: The main body assembly (11) further comprises a hexagonal screw head (118) threadedly mounted on the lower end of the guide plate (116), and the hexagonal screw head (118) is used to fix the ejector pin (117) on the guide plate (116).

6. The ejector pin processing mold for preventing ejector pin bending according to claim 1, characterized in that: The ejector pins (117) are installed through the lower die head (112), and the ejector pins (117) are distributed at the four corners of the upper punch of the lower die head (112).

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