Multi-directional upside-down demolding injection mold

Abstract

The injection mold comprises a base, a mounting frame is connected to the base, an electric telescopic rod is mounted at the top of the mounting frame, the end of the electric telescopic rod penetrates through the mounting frame and is connected with a mounting plate, an upper mold is mounted at the bottom of the mounting plate, and a lower mold matched with the upper mold is connected to the top of the base. According to the multidirectional inverted demolding injection mold, through the arrangement of the mounting plate, the trigger block and the pushing structure and the synergistic effect of the mounting plate, the trigger block and the pushing structure, automatic operation of the mold in the mold closing and opening processes is achieved. Specifically, in the mold closing process of the upper mold and the lower mold, when the mounting plate drives the upper mold to move downwards, the trigger block connected to the upper mold can synchronously trigger the pushing structure, and the action enables the first mold block and the second mold block in the lower mold to be accurately pushed to be closed.

Description

Technical Field

[0001] The invention relates to the technical field of injection mold equipment, in particular to a multi-directional undercut demoulding injection mold. Background Art

[0002] An injection mold is a tool used to produce plastic products. It is a key device to give plastic products a complete structure and precise size. The basic structure of an injection mold includes molding parts, pouring system, guide components, demoulding mechanism, temperature control system and exhaust system, etc. The molding parts are composed of a core and a cavity, which are responsible for giving the plastic material shape and size.

[0003] In order to meet the functional requirements of products, plastic products are often designed with undercut structures. Undercuts refer to the protrusions or depressions set on the products. These structures cannot be directly removed along the parting direction after molding. For products with multi-directional undercuts, traditional demoulding methods such as simple sliders or inclined top mechanisms are often difficult to meet the requirements. Multi-directional undercut demoulding technology came into being. Through complex mechanism design, undercuts in all directions can be smoothly removed from the product at the same time when the mold is opened. This technology usually uses a combination of hydraulic cylinders, sliders, inclined tops and other components to achieve synchronous demoulding of multi-directional undercuts through precise mechanical movement. For example, the hydraulic cylinder can drive the connecting block to realize the movement of the slider through the linkage of the inclined groove. This design not only improves the efficiency and reliability of demoulding, but also effectively utilizes the mold space and reduces the complexity and cost of the mold.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original multi-directional undercut demoulding. Summary of the invention

[0005] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too single, and provides a solution of a multi-directional undercut demolding injection mold that is significantly different from the existing technology to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a multi-directional undercut demolding injection mold, comprising a base, a mounting frame connected to the base, an electric telescopic rod installed on the top of the mounting frame, and the end of the electric telescopic rod passes through the mounting frame and is connected to a mounting plate, an upper mold is installed at the bottom of the mounting plate, and a lower mold matching the upper mold is connected to the top of the base, a first sliding cavity and a second sliding cavity are respectively opened in the lower mold, and a first module and a second module are respectively arranged in the first sliding cavity and the second sliding cavity, a pushing structure is connected between the first module, the second module and the base, an ejection structure is installed on the lower mold and the mounting frame, a trigger block that triggers the pushing structure and the ejection structure is connected to the mounting plate, and a workpiece is arranged between the upper mold, the lower mold, the first module and the second module.

[0007] The pushing structure includes a push rod, a limiting cylinder, a delivery pipe, a box body, a first piston plate, a connecting rod, and a connecting spring. The first module and the second module are both connected to a push rod, and the end of the push rod is located in the limiting cylinder, and the limiting cylinder is connected to a delivery pipe, the delivery pipe is connected to the box body, and a first piston plate is provided in the box body, and a connecting rod is connected to the first piston plate, the end of the connecting rod passes through the top of the box body and is connected to a connecting spring, and the end of the connecting spring is connected to the top of the box body.

[0008] The delivery pipe is a bifurcated pipe, and the bifurcated ends of the delivery pipe are respectively connected to a plurality of limiting cylinders.

[0009] The ejection structure includes a power unit and a control ejection unit, the power unit includes a box, a second piston plate, a column, a connecting tube, and a pressure spring. The mounting frame is connected to the box, and the box is provided with a second piston plate, and the second piston plate is connected to the column. The end of the column passes through the bottom of the box and is located in the connecting tube, and a pressure spring is connected between the inner wall of the connecting tube and the end of the column.

[0010] The control ejection part includes a flow tube, a slot plate, a shell, a return spring, an opening plate, a branch slot, an ejection rod, and a positioning touch rod. The outer wall of the box body is connected to the flow tube, and the end of the flow tube is connected to the slot plate, and the slot plate is connected to the base. The slot plate is connected to the shell, and the shell is connected to the return spring, and the end of the return spring is connected to the opening plate. The end of the opening plate passes through the outer wall of the slot plate, and the slot plate is connected to the branch slot through another flow tube. The branch slot is opened in the lower mold, and the branch slot is connected to the ejection rod, and the ejection rod is arranged in the lower mold. A positioning touch rod is arranged in the first sliding cavity, and one end of the positioning touch rod is connected to the first module, and the other end of the positioning touch rod passes through the lower mold for extruding and pushing the opening plate.

[0011] The opening plate is connected to the slot plate and the housing in a snap-fitting sliding manner, and the opening on the opening plate is used for alignment and misalignment with the slot in the slot plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the multi-directional inverted demolding injection mold realizes the automated operation of the mold during the mold closing and mold opening process through the setting of the mounting plate, the trigger block and the pushing structure, and the coordinated effect of the mounting plate, the trigger block and the pushing structure. Specifically, during the process of closing the upper and lower molds, when the mounting plate drives the upper mold to move downward, the trigger block connected thereto will synchronously trigger the pushing structure. This action enables the first module and the second module in the lower mold to be accurately pushed to close the mold, creating good conditions for the subsequent injection molding process. After the injection molding is completed, during the process of the upper mold moving up and resetting, the mounting plate is separated from the extrusion of the pushing structure, and the pushing structure is automatically reset, driving the first module and the second module to be demolded smoothly. This process does not require the control of additional equipment, which greatly simplifies the operation process and improves production efficiency.

[0013] In addition, the convenience and reliability of demoulding are further improved by the setting of the mounting plate, the trigger block and the ejection structure. When the mold is opened, the mounting plate drives the upper mold to move upward, pushes the connecting cylinder upward, and triggers the power part of the ejection structure. At this time, the internal hydraulic oil is pushed into the slot plate of the ejection control part to prepare for the subsequent ejection work. The positioning feeler rod set on the first module plays a key role in the demoulding process. When the first module moves and resets to the specified position in the first sliding cavity, the end of the positioning feeler rod will accurately squeeze and trigger the opening plate, so that it moves into the shell in the slot plate. This action makes the opening on the opening plate aligned with the groove on the slot plate, and the hydraulic oil can smoothly pass through the slot plate and enter the support groove, pushing the ejector rod to eject the injection molded workpiece. The entire ejection process does not require additional equipment and manual control operations, and the ejection structure will only be started after the first module moves and recovers in place, effectively avoiding the damage of the workpiece due to the incomplete recovery of the first module, ensuring the integrity and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention; Figure 2 It is a schematic diagram of the front cross-sectional structure of the present invention in the mold clamping state; Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention in the mold opening state; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of the front cross-sectional structure of the present invention in a state of ejecting a workpiece; Figure 6 It is a front view structural schematic diagram of the present invention.

[0015] In the figure: 1, base; 2, mounting frame; 3, electric telescopic rod; 4, mounting plate; 5, upper mold; 6, lower mold; 7, first slide cavity; 8, first module; 9, second slide cavity; 10, second module; 11, pushing structure; 1101, push rod; 1102, limit cylinder; 1103, delivery pipe; 1104, box body; 1105, first piston plate; 1106, connecting rod; 1107, connecting spring; 12, ejection structure; 1201, box body; 1202, second piston plate; 1203, column; 1204, connecting cylinder; 1205, pressure spring; 1206, flow tube; 1207, slot plate; 1208, shell; 1209, reset spring; 1210, opening plate; 1211, support slot; 1212, ejector rod; 1213, positioning touch rod; 13, trigger block; 14, workpiece. DETAILED DESCRIPTION

[0016] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-6 The present invention provides a technical solution: a multi-directional undercut demoulding injection mold, comprising a base 1, a mounting frame 2, an electric telescopic rod 3, a mounting plate 4, an upper mold 5, a lower mold 6, a first sliding cavity 7, a first module 8, a second sliding cavity 9, a second module 10, a pushing structure 11, a push rod 1101, a limiting cylinder 1102, a delivery pipe 1103, a box body 1104, a first piston plate 1105, a connecting rod 1106, a connecting spring 1107, an ejection structure 12, a box body 1201, a second piston plate 1202, a column 1203, a connecting cylinder 1204, a pressure spring 1205, a flow tube 1206, a groove plate 1207, a shell 1208, a reset spring 1209, an opening plate 1210, a support groove 1211, an ejection rod 1212, and a positioning touch rod 12 13, trigger block 13, workpiece 14, a mounting frame 2 is connected to the base 1, an electric telescopic rod 3 is installed on the top of the mounting frame 2, and the end of the electric telescopic rod 3 passes through the mounting frame 2 and is connected to the mounting plate 4, an upper mold 5 is installed at the bottom of the mounting plate 4, and a lower mold 6 matching the upper mold 5 is connected to the top of the base 1, a first sliding cavity 7 and a second sliding cavity 9 are respectively opened in the lower mold 6, and a first module 8 and a second module 10 are respectively arranged in the first sliding cavity 7 and the second sliding cavity 9, a pushing structure 11 is connected between the first module 8, the second module 10 and the base 1, an ejection structure 12 is installed on the lower mold 6 and the mounting frame 2, a trigger block 13 for triggering the pushing structure 11 and the ejection structure 12 is connected to the mounting plate 4, and a workpiece 14 is arranged between the upper mold 5, the lower mold 6, the first module 8 and the second module 10.

[0018] The pushing structure 11 includes a push rod 1101, a limiting cylinder 1102, a delivery tube 1103, a box body 1104, a first piston plate 1105, a connecting rod 1106, and a connecting spring 1107. The first module 8 and the second module 10 are both connected with the push rod 1101, and the end of the push rod 1101 is located in the limiting cylinder 1102, and the limiting cylinder 1102 is connected with the delivery tube 1103, the delivery tube 1103 is connected to the box body 1104, and the box body 1104 is provided with a first piston plate 1105, and the first piston plate 1105 is connected with the connecting rod 1106, the end of the connecting rod 1106 passes through the top of the box body 1104 and is connected with a connecting spring 1107, and the end of the connecting spring 1107 is connected to the top of the box body 1104.

[0019] The delivery tube 1103 is a bifurcated tube, and the bifurcated ends of the delivery tube 1103 are respectively connected to a plurality of limiting cylinders 1102 .

[0020] The ejection structure 12 includes a power unit and a control ejection unit, the power unit includes a box body 1201, a second piston plate 1202, a column 1203, a connecting tube 1204, and a pressure spring 1205. The mounting frame 2 is connected to the box body 1201, and the second piston plate 1202 is provided in the box body 1201, and the column 1203 is connected to the second piston plate 1202, the end of the column 1203 passes through the bottom of the box body 1201 and is located in the connecting tube 1204, and a pressure spring 1205 is connected between the inner wall of the connecting tube 1204 and the end of the column 1203.

[0021] The control ejection part includes a flow tube 1206, a slot plate 1207, a shell 1208, a return spring 1209, an opening plate 1210, a support slot 1211, an ejection rod 1212, and a positioning touch rod 1213. The outer wall of the box body 1201 is connected to the flow tube 1206, and the end of the flow tube 1206 is connected to the slot plate 1207, and the slot plate 1207 is connected to the base 1, and the slot plate 1207 is connected to the shell 1208, and the shell 1208 is connected to the return spring 1209, and the end of the return spring 1209 is connected to the return spring 1209. An opening plate 1210 is connected, and the end of the opening plate 1210 passes through the outer wall of the slot plate 1207, and the slot plate 1207 is connected to a branch slot 1211 through another flow tube 1206. The branch slot 1211 is opened in the lower mold 6, and the branch slot 1211 is connected to an ejector rod 1212, and the ejector rod 1212 is arranged in the lower mold 6. A positioning touch rod 1213 is provided in the first sliding cavity 7, and one end of the positioning touch rod 1213 is connected to the first module 8, and the other end of the positioning touch rod 1213 passes through the lower mold 6 for squeezing and pushing the opening plate 1210.

[0022] The opening plate 1210 is in a snap-fitting sliding connection with the slot plate 1207 and the housing 1208 , and the opening on the opening plate 1210 is used for alignment and misalignment with the slot in the slot plate 1207 .

[0023] Working principle: According to Figure 1 As shown, when the mold is closed for injection molding, the electric telescopic rod 3 pushes the mounting plate 4 to drive the upper mold 5 to move downward, so that the trigger block 13 squeezes the connecting rod 1106 and the piston plate 1105 to move downward in the box body 1104, and the connecting spring 1107 is compressed, so that the hydraulic oil passes through the delivery pipe 1103 to the limiting cylinder 1102, so that the push rod 1101 pushes the first module 8 to move in the first sliding cavity 7 to participate in the mold closing injection molding operation, and at the same time, the second module 10 pushes the second sliding cavity 9 to move at the same time to participate in the mold closing injection molding; After the injection molding is completed, when the mold is opened, the electric telescopic rod 3 drives the upper mold 5 to move upward and reset through the mounting plate 4, and contacts and squeezes the connecting cylinder 1204. Since the opening on the opening plate 1210 is not aligned with the groove on the groove plate 1207, the hydraulic oil in the box body 1201 cannot pass through the flow pipe 1206 and the groove plate 1207 to enter the branch groove 1211, so that the connecting cylinder 1204 moves upward under the limit of the column 1203, so that the pressure spring 1205 between the column 1203 and the connecting cylinder 1204 is restrained by force; When the upper mold 5 moves upward and resets, it is freed from squeezing the connecting rod 1106, and the connecting spring 1107 is freed from restraint, driving the connecting rod 1106 and the piston plate 1105 to move upward and reset in the box body 1104, so that the push rod 1101 moves into the limiting cylinder 1102, driving the first module 8 to reset into the first sliding cavity 7, and the second module 10 to move into the second sliding cavity 9 to reset. When the first module 8 completes the reset, the positioning contact rod 1213 connected to the first module 8 will squeeze and push the opening plate 1210 to move into the housing 1208, and the reset spring 1209 is compressed, so that the opening on the opening plate 1210 is aligned with the groove on the groove plate 1207; At this time, the pressure spring 1205 is freed from its restraint, and the hydraulic oil passes through the groove smoothly, and enters the support groove 1211 on the lower mold 6 through another flow tube 1206, pushing the ejector rod 1212 to eject the workpiece 14, making it easier to take the workpiece 14 later. This is the working principle of the multi-directional inverted demolding injection mold.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional undercut demoulding injection mold, comprising a base (1), characterized in that: The base (1) is connected to a mounting frame (2), an electric telescopic rod (3) is installed on the top of the mounting frame (2), and the end of the electric telescopic rod (3) passes through the mounting frame (2) and is connected to a mounting plate (4), an upper mold (5) is installed on the bottom of the mounting plate (4), and a lower mold (6) matching the upper mold (5) is connected to the top of the base (1), a first sliding cavity (7) and a second sliding cavity (9) are respectively opened in the lower mold (6), and a first module (8) and a second module (10) are respectively arranged in the first sliding cavity (7) and the second sliding cavity (9), a pushing structure (11) is connected between the first module (8), the second module (10) and the base (1), an ejection structure (12) is installed on the lower mold (6) and the mounting frame (2), a trigger block (13) for triggering the pushing structure (11) and the ejection structure (12) is connected to the mounting plate (4), and a workpiece (14) is arranged between the upper mold (5), the lower mold (6), the first module (8) and the second module (10).

2. A multi-directional undercut demoulding injection mold according to claim 1, characterized in that: The pushing structure (11) comprises a push rod (1101), a limiting cylinder (1102), a delivery tube (1103), a box body (1104), a first piston plate (1105), a connecting rod (1106), and a connecting spring (1107). The first module (8) and the second module (10) are both connected to the push rod (1101), and the end of the push rod (1101) is located in the limiting cylinder (1102), and the limiting cylinder (1102) is connected to the delivery tube (1103), the delivery tube (1103) is connected to the box body (1104), and the box body (1104) is provided with a first piston plate (1105), and the first piston plate (1105) is connected to the connecting rod (1106), the end of the connecting rod (1106) passes through the top of the box body (1104) and is connected to the connecting spring (1107), and the end of the connecting spring (1107) is connected to the top of the box body (1104).

3. The multi-directional undercut demoulding injection mold according to claim 2, characterized in that: The delivery tube (1103) is a bifurcated tube, and the bifurcated ends of the delivery tube (1103) are respectively connected to a plurality of limiting cylinders (1102).

4. The multi-directional undercut demoulding injection mold according to claim 1, characterized in that: The ejection structure (12) comprises a power unit and a control ejection unit, the power unit comprising a box (1201), a second piston plate (1202), a column (1203), a connecting tube (1204), and a pressure spring (1205); the mounting frame (2) is connected to the box (1201), a second piston plate (1202) is arranged in the box (1201), and the second piston plate (1202) is connected to the column (1203); an end of the column (1203) passes through the bottom of the box (1201) and is located in the connecting tube (1204), and a pressure spring (1205) is connected between the inner wall of the connecting tube (1204) and the end of the column (1203).

5. The multi-directional undercut demoulding injection mold according to claim 4, characterized in that: The control ejection portion comprises a flow tube (1206), a slot plate (1207), a shell (1208), a return spring (1209), an opening plate (1210), a support slot (1211), an ejection rod (1212), and a positioning touch rod (1213); the outer wall of the box body (1201) is connected to the flow tube (1206), and the end of the flow tube (1206) is connected to the slot plate (1207), and the slot plate (1207) is connected to the base (1); the slot plate (1207) is connected to the shell (1208), and the shell (1208) is connected to the return spring (1209), and the end of the return spring (1209) is connected to the return spring (1209). An opening plate (1210) is connected, the end of the opening plate (1210) passes through the outer wall of the slot plate (1207), and the slot plate (1207) is connected to a branch slot (1211) through another flow tube (1206), the branch slot (1211) is opened in the lower mold (6), and the branch slot (1211) is connected to an ejector rod (1212), and the ejector rod (1212) is arranged in the lower mold (6), a positioning feeler rod (1213) is arranged in the first sliding cavity (7), one end of the positioning feeler rod (1213) is connected to the first module (8), and the other end of the positioning feeler rod (1213) passes through the lower mold (6) for squeezing and pushing the opening plate (1210).

6. The multi-directional undercut demoulding injection mold according to claim 5, characterized in that: The opening plate (1210) is in a snap-fitting sliding connection with the slot plate (1207) and the housing (1208), and the opening on the opening plate (1210) is used to align and misalign with the slot in the slot plate (1207).

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