Mould locking mechanism for injection molding machine

Abstract

The utility model discloses a mould locking mechanism for an injection molding machine, which relates to the technical field of injection molding machines and comprises a bottom plate, a base plate is fixed on one side of the top of the bottom plate, a movable plate component is assembled in the middle of the top of the bottom plate, and a fixed plate component fixed on the top of the bottom plate is arranged on one side, far away from the base plate, of the movable plate component. A hydraulic rod connected with the movable plate assembly is installed in the middle of the side wall of the base plate, and guide rods are fixed to the positions, close to the four corners, of one side of the base plate. Through the arrangement of the movable plate assembly and the fixed plate assembly, the mold disassembly and assembly steps are simple, the time consumed for manually operating tools to disassemble is shortened, molds of different models are efficiently replaced, and the product injection molding efficiency is improved in a disguised mode; buffering protection is achieved when the two sets of molds are closed, the situation that the two sets of molds are in rigid contact when making contact is avoided, and the service life of the molds can be prolonged to a certain degree.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, specifically to a mold clamping mechanism for injection molding machines. Background Technology

[0002] Injection molding machines, also known as injection molding machines or injection molding machines, are the main molding equipment used to produce various shapes of plastic products from thermoplastic or thermosetting plastics using plastic molds. They are classified as vertical, horizontal, and all-electric. Injection molding machines heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity. The clamping mechanism is an important component that secures the stationary and moving molds during operation. The clamping mechanism typically consists of a top plate, a moving plate, a tail plate, and multiple sliding rods. The moving plate and tail plate are fixed in place, and sliding rods are fixed between the four corners of the moving plate and tail plate, allowing the moving plate to slide between the four sliding rods.

[0003] The existing mold clamping mechanism of injection molding machines has certain defects in use. It requires a large number of bolts to fix the mold to the top plate and the moving plate. When producing different products, the mold needs to be disassembled and replaced manually. The disassembly of the mold requires a large number of bolts to be turned manually, which makes the disassembly and assembly of the mold time-consuming and troublesome in actual use. Therefore, a mold clamping mechanism for injection molding machines is proposed. Utility Model Content

[0004] Therefore, the purpose of this utility model is to provide a mold clamping mechanism for injection molding machines to solve the technical problems mentioned in the background above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a clamping mechanism for an injection molding machine, comprising a base plate, a base plate fixed to one side of the top of the base plate, a movable plate assembly mounted at the center of the top of the base plate, a fixed plate assembly fixed to the top of the base plate on the side of the movable plate assembly away from the base plate, a hydraulic rod connected to the movable plate assembly mounted at the center of the side wall of the base plate, and a guide rod fixed on one side of the base plate near the four corners, the guide rod passing through the movable plate assembly and fixedly connected to the fixed plate assembly;

[0006] A mold is mounted on the side of the moving plate assembly and the fixed plate assembly that are close to each other. The moving plate assembly includes a plate frame that is slidably arranged with four sets of guide rods. A notch is opened on the side of the plate frame that is close to the fixed plate assembly. A connecting plate is movably mounted in the notch. Two sets of L-grooves extending to the outer wall are opened on the top of the connecting plate. An L-arm fixed to the mold is slidably arranged in the L-grooves. Multiple sets of positioning holes are opened on the end face of the L-arm. Two sets of blind grooves are opened on the top of the connecting plate on the side of the two sets of L-grooves that are close to each other. A moving rod is mounted in each set of blind grooves. A third spring is fixed to the bottom end of the moving rod and the lower inner wall of the blind groove. Three sets of inclined grooves are opened on the side of the moving rod that is close to the L-grooves. A locking rod extending into the L-grooves is slidably arranged in the inclined grooves. A second spring fixed to the connecting plate is mounted on the outer wall of the locking rod.

[0007] As a preferred technical solution of the clamping mechanism for an injection molding machine according to the present invention, a matching circular channel is provided at the contact position between the plate frame and the guide rod, the internal components of the fixed plate assembly are the same as those of the moving plate assembly, and the fixed plate assembly is provided with an injection hole communicating with the mold on the side away from the moving plate assembly.

[0008] As a preferred technical solution of the clamping mechanism for injection molding machine of the present invention, the top of the plate frame is rotatably provided with a top plate for sealing the notch, and the top of the top plate is reserved with two sets of shallow grooves. Each set of shallow grooves is provided with a plug rod extending to the front and rear ends of the top plate. The inner wall of the notch is provided with a plug hole at the contact position with the plug rod.

[0009] As a preferred technical solution of the mold clamping mechanism for injection molding machine according to the present invention, the connecting plate is provided with multiple sets of first springs on the side away from the mold, and the other end of the multiple sets of first springs is fixed to the inner wall of the plate frame.

[0010] As a preferred technical solution of the clamping mechanism for an injection molding machine according to the present invention, the front and rear outer walls of the connecting plate are provided with constraint blocks extending into the notch, and the inner wall of the notch is provided with a constraint groove at the contact position with the constraint block.

[0011] As a preferred technical solution of the clamping mechanism for an injection molding machine according to the present invention, a transverse circular channel is provided in the connecting plate at the contact position with the locking rod, and the transverse circular channel connects the L-groove and the blind groove.

[0012] As a preferred technical solution of the clamping mechanism for an injection molding machine according to the present invention, the top of the base plate is provided with two sets of sliding grooves, and a slider fixed to the bottom end of the plate frame is slidably disposed in the sliding grooves.

[0013] In summary, the present invention has the following main advantages:

[0014] This utility model simplifies the mold assembly and disassembly process by using a moving and stationary plate assembly, reducing the time spent on manual tool disassembly and making the replacement of different mold models more efficient. This can indirectly improve the efficiency of product injection molding. Furthermore, the connection plate and the plate frame are buffered and protected when the two sets of molds are closed by the action of the first spring, avoiding rigid contact between the two sets of molds and extending the service life of the mold to a certain extent. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is an unfolded view of the moving plate assembly and the mold of this utility model;

[0017] Figure 3 This is a schematic diagram of the mold structure of this utility model;

[0018] Figure 4 This is a sectional view of the connecting plate of this utility model from the side.

[0019] Figure 5 This is a front sectional view of the connecting plate of this utility model;

[0020] Figure 6 This is a top sectional view of the connecting plate of this utility model.

[0021] In the diagram: 100, base plate;

[0022] 110. Base plate; 111. Guide rod; 112. Hydraulic rod; 120. Moving plate assembly; 121. Plate frame; 122. Notch; 123. Top plate; 124. Shallow groove; 125. Insert rod; 126. Insertion hole; 127. First spring; 130. Fixed plate assembly; 140. Mold; 141. L-arm; 142. Positioning hole; 150. Connecting plate; 151. L-groove; 152. Moving rod; 153. Blind groove; 154. Locking rod; 155. Second spring; 156. Inclined groove; 157. Third spring; 158. Constraint block; 159. Constraint groove. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The embodiments of this utility model will be described below based on its overall structure.

[0025] A clamping mechanism for an injection molding machine, such as Figures 1 to 6As shown, the system includes a base plate 100, a base plate 110 fixed to one side of the top of the base plate 100, a movable plate assembly 120 mounted at the center of the top of the base plate 100, a fixed plate assembly 130 fixed to the top of the base plate 100 on the side of the movable plate assembly 120 away from the base plate 110, a hydraulic rod 112 connected to the movable plate assembly 120 mounted at the center of the side wall of the base plate 110, and a guide rod 111 fixed on one side of the base plate 110 near the four corners. The guide rod 111 passes through the movable plate assembly 120 and is fixedly connected to the fixed plate assembly 130.

[0026] A mold 140 is mounted on the side of the moving plate assembly 120 and the fixed plate assembly 130 that are close to each other. The moving plate assembly 120 includes a plate frame 121 that is slidably disposed with four sets of guide rods 111. A notch 122 is opened on the side of the plate frame 121 that is close to the fixed plate assembly 130. A connecting plate 150 is movably mounted in the notch 122. Two sets of L-grooves 151 extending to the outer wall are opened on the top of the connecting plate 150. L-arms 141 that are fixed to the mold 140 are slidably disposed in the L-grooves 151. Multiple sets of L-arms 141 are opened on the end face. The top of the connecting plate 150, located near the two sets of L-grooves 151, has two sets of blind grooves 153. Each set of blind grooves 153 is equipped with a moving rod 152. The bottom end of the moving rod 152 is fixed to the lower inner wall of the blind groove 153 with a third spring 157. The moving rod 152 is provided with three sets of inclined grooves 156 near the L-grooves 151. A locking rod 154 extending into the L-grooves 151 is slidably provided in the inclined grooves 156. The outer wall of the locking rod 154 is equipped with a second spring 155 fixed to the connecting plate 150.

[0027] The top of the frame 121 is rotatably provided with a top plate 123 to seal the notch 122. The top of the top plate 123 has two sets of shallow grooves 124. Each set of shallow grooves 124 has a sliding insert rod 125 extending to the front and rear ends of the top plate 123. The inner wall of the notch 122 is provided with an insertion hole 126 at the contact position between the insert rod 125 and the notch.

[0028] Multiple sets of first springs 127 are provided on the side of the connecting plate 150 away from the mold 140, and the other end of the multiple sets of first springs 127 is fixed to the inner wall of the plate frame 121.

[0029] When installing mold 140, rotate top plate 123 around its connection point with frame 121 to open it, exposing the top of slot 122 to external force. Then, place L-arm 141 directly above connecting plate 150 and aligned with L-slot 151. Mold 140 can then be lowered, and L-arm 141 will enter L-slot 151 until it reaches its lowest point and cannot be lowered further. At this point, mold 140 is located at the center of one side of frame 121. Manually rotate top plate 123 in the opposite direction to seal the top of slot 122. Apply relatively distant external forces to the two sets of insertion rods 125, causing their ends to insert into the insertion holes 126, and locking the top plate 123 at the top of the notch 122. At this time, the top plate 123 presses the two sets of moving rods 152 and moves down a certain distance to compress the third spring 157. Meanwhile, the inclined groove 156 on one side of the moving rod 152 generates a lateral pressing force on the locking rod 154, causing the locking rod 154 to move and its end to enter the positioning hole 142. The inner L-arm 141 and the mold 140 are locked, completing the rapid installation effect of the mold 140.

[0030] When the hydraulic rod 112 pushes the moving plate assembly 120 toward the fixed plate assembly 130 to close the mold, the first spring 127 will be compressed when the two sets of molds 140 come into contact. This is to cope with the force generated during mold closing and to avoid the molds being in rigid contact. This can prevent the hydraulic rod 112 from extending too far and causing damage to the contact surface of the two sets of molds 140, thereby ensuring that the service life of the molds 140 is extended.

[0031] Please refer to this carefully. Figure 1 A matching circular channel is provided at the contact position between the plate frame 121 and the guide rod 111. The internal components of the fixed plate assembly 130 are the same as those of the moving plate assembly 120. The fixed plate assembly 130 is provided with an injection hole that communicates with the mold 140 on the side away from the moving plate assembly 120. The two sets of molds 140 are closed to form a complete mold.

[0032] It enables convenient disassembly of the two sets of molds 140, and with the assistance of the guide rod 111, it can accurately achieve the purpose of mold closing. At the same time, it can inject the raw materials into the mold cavities of the two sets of molds 140 through the injection hole to prepare the product.

[0033] Please refer to this carefully. Figure 6 The front and rear outer walls of the connecting plate 150 are provided with constraint blocks 158 extending into the notch 122, and the inner wall of the notch 122 is provided with a constraint groove 159 at the contact position between the constraint block 158 and the inner wall of the notch 122.

[0034] By utilizing the interaction of the constraint groove 159 and the constraint block 158, the connecting plate 150 can only slide at a fixed point within the notch 122, thus achieving the final purpose of buffering and shock absorption.

[0035] Please refer to this carefully. Figure 4A transverse circular channel is provided in the connecting plate 150 at the contact position with the locking rod 154, and the transverse circular channel connects the L groove 151 and the blind groove 153.

[0036] The purpose of guiding the locking lever 154 is to make it move linearly into the positioning hole 142 along a preset trajectory, thereby achieving the locking effect on the L-arm 141.

[0037] Please refer to this carefully. Figure 1 The top of the base plate 100 is provided with two sets of sliding grooves, and a slider fixed to the bottom of the plate frame 121 is slidably installed in the sliding grooves.

[0038] The contact area between the plate frame 121 and the base plate 100 is reduced, resulting in less additional resistance when the plate frame 121 slides.

[0039] In use, when installing mold 140, rotate top plate 123 around the connection point with frame 121 to open it, exposing the top of notch 122 to external force. Then, place L-arm 141 directly above connecting plate 150 and aligned with L-groove 151. Mold 140 can then be lowered, and L-arm 141 will enter L-groove 151 until it reaches its lowest point and cannot be lowered further. At this point, mold 140 is located at the center of one side of frame 121. Manually rotate top plate 123 in the opposite direction to seal the top of notch 122. Then, a relatively distant external force is applied to the two sets of insertion rods 125, causing their ends to be inserted into the insertion holes 126, and the top plate 123 to be locked at the top of the notch 122. At this time, the top plate 123 presses the two sets of moving rods 152 and moves down a certain distance to compress the third spring 157, while the inclined groove 156 on one side of the moving rod 152 generates a lateral pressing force on the locking rod 154, causing the locking rod 154 to move and its end to enter the positioning hole 142, locking the inner L arm 141 and the mold 140, thus completing the rapid installation effect of the mold 140.

[0040] When the hydraulic rod 112 pushes the moving plate assembly 120 toward the fixed plate assembly 130 to close the mold, the first spring 127 will be compressed when the two sets of molds 140 come into contact. This is to cope with the force generated during mold closing and to avoid the molds being in rigid contact. This can prevent the hydraulic rod 112 from extending too far and causing damage to the contact surface of the two sets of molds 140, thereby ensuring that the service life of the molds 140 is extended. The parts of this device not mentioned are the same as or can be implemented using existing technology.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A clamping mechanism for an injection molding machine, comprising a base plate (100), characterized in that: A base plate (110) is fixed to one side of the top of the base plate (100). A movable plate assembly (120) is mounted at the center of the top of the base plate (100). A fixed plate assembly (130) is fixed to the top of the base plate (100) on the side of the movable plate assembly (120) away from the base plate (110). A hydraulic rod (112) connected to the movable plate assembly (120) is installed at the center of the side wall of the base plate (110). A guide rod (111) is fixed on one side of the base plate (110) and near the four corners. The guide rod (111) passes through the movable plate assembly (120) and is fixedly connected to the fixed plate assembly (130). A mold (140) is mounted on the side of the moving plate assembly (120) and the fixed plate assembly (130) that are close to each other. The moving plate assembly (120) includes a plate frame (121) that is slidably disposed with four sets of guide rods (111). A notch (122) is provided on the side of the plate frame (121) that is close to the fixed plate assembly (130). A connecting plate (150) is movably mounted in the notch (122). Two sets of L-grooves (151) extending to the outer wall are provided on the top of the connecting plate (150). An L-arm (141) fixed to the mold (140) is slidably disposed in the L-grooves (151). Multiple sets of fixed... The connecting plate (150) has a hole (142) and two sets of blind grooves (153) on the top side of the two sets of L grooves (151) close to each other. A moving rod (152) is installed in each set of blind grooves (153). A third spring (157) is fixed to the bottom end of the moving rod (152) and the lower inner wall of the blind groove (153). Three sets of inclined grooves (156) are opened on the side of the moving rod (152) close to the L groove (151). A locking rod (154) extending into the L groove (151) is slidably installed in the inclined groove (156). A second spring (155) fixed to the connecting plate (150) is installed on the outer wall of the locking rod (154).

2. The clamping mechanism for an injection molding machine according to claim 1, characterized in that: The plate frame (121) has a matching circular channel at the contact position with the guide rod (111). The components inside the fixed plate assembly (130) are the same as those in the moving plate assembly (120). The fixed plate assembly (130) has an injection hole that communicates with the mold (140) on the side away from the moving plate assembly (120).

3. The clamping mechanism for an injection molding machine according to claim 1, characterized in that: The top of the frame (121) is rotatably provided with a top plate (123) that seals the notch (122). The top of the top plate (123) has two sets of shallow grooves (124) reserved. Each set of shallow grooves (124) is provided with a plug rod (125) that extends to the front and rear ends of the top plate (123). The inner wall of the notch (122) is provided with a plug hole (126) at the contact position between the plug rod (125) and the notch (122).

4. A clamping mechanism for an injection molding machine according to claim 1, characterized in that: The connecting plate (150) is provided with multiple sets of first springs (127) on the side away from the mold (140), and the other end of the multiple sets of first springs (127) is fixed to the inner wall of the plate frame (121).

5. A clamping mechanism for an injection molding machine according to claim 1, characterized in that: The front and rear outer walls of the connecting plate (150) are provided with constraint blocks (158) extending into the notch (122), and the inner wall of the notch (122) is provided with a constraint groove (159) at the contact position between the constraint block (158).

6. A clamping mechanism for an injection molding machine according to claim 1, characterized in that: A transverse circular channel is provided in the connecting plate (150) at the contact position with the locking rod (154), and the transverse circular channel connects the L groove (151) and the blind groove (153).

7. A clamping mechanism for an injection molding machine according to claim 1, characterized in that: The top of the base plate (100) is provided with two sets of sliding grooves, and a slider fixed to the bottom of the plate frame (121) is slidably disposed in the sliding grooves.

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