Crosshead of flexible injection molding machine and production method

Abstract

The invention discloses a crosshead of a flexible injection molding machine, and belongs to the technical field of crossheads of flexible injection molding machines. The device comprises a crosshead body, sliding arms are symmetrically arranged on the crosshead body up and down, sliding holes in sliding fit with guide sliding rails are formed in the ends of the sliding arms, hinge arms are arranged on the two sides of the crosshead body, and hinge holes used for being hinged to hinge frames in a penetrating and inserting mode are formed in the ends of the hinge arms. The device further comprises an oil injection mechanism, the oil injection mechanism comprises oil injection grooves extending to the inner side of the crosshead body, each sliding hole and each hinge hole are correspondingly communicated with one oil injection groove, and the oil injection grooves are communicated with the oil injection grooves. The oil injection groove is used for regularly injecting oil into the sliding hole and the hinge hole in a high-temperature environment. In the high-temperature environment, oil can be regularly and automatically supplied to the sliding hole and the hinge hole through the structure, abrasion is effectively reduced, and the equipment failure rate is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flexible injection molding machine cross head, in particular to a flexible injection molding machine cross head and production method. BACKGROUND

[0002] The flexible injection molding machine is a plastic forming processing equipment, which melts the thermoplastic or thermosetting plastic by heating, and then injects it into the mold cavity under high pressure to obtain the required shape of the plastic product after cooling and solidification.

[0003] The cross head of the flexible injection molding machine is a key component in the mold closing mechanism, and its main function is to convert the linear motion of the oil cylinder into the swing of the double-toggle linkage, so as to realize the smooth opening and closing of the mold plate and high-pressure locking. Its principle is based on the mechanical lever effect: the oil cylinder piston pushes the cross head through the piston rod, the cross head distributes the force to the double-toggle linkage, and the swing of the linkage drives the mold plate to move.

[0004] The above prior art solution has the following disadvantages: the cross head of the flexible injection molding machine is often in a high temperature environment, the internal lubricating oil is easy to volatilize under heat, and is easy to adsorb dust during operation, which leads to the decrease of lubricating performance and the aggravation of component wear, so regular oiling maintenance is required, which increases the steps to be completed during maintenance and increases the risk during use. SUMMARY

[0005] The present application provides a flexible injection molding machine cross head, which can solve the problem of automatic addition of lubricating oil in the prior art.

[0006] A flexible injection molding machine cross head, comprising a cross head body, the cross head body is symmetrically provided with a sliding arm above and below, the end of the sliding arm is provided with a sliding hole matched with a guide sliding rail, the two sides of the cross head body are provided with a hinged arm, the end of the hinged arm is provided with a hinged hole for mutual insertion and hinging with a hinged frame, the two groups of hinged frames move relative to each other, thereby driving the cross head body to move forward and backward, completing the conversion of reciprocating motion, the device further comprises an oil injection mechanism, the oil injection mechanism comprises an oil injection groove extending on the inner side of the cross head body, each group of sliding holes and hinged holes are correspondingly communicated with a group of oil injection grooves, and the oil injection groove is used for periodically injecting oil into the sliding hole and the hinged hole in a high temperature environment.

[0007] As a further scheme of the present application: the rear side of the cross head body is provided with an oil injection hole communicated with a plurality of oil injection grooves, and the communication position is arranged around the oil injection hole, an oil injection valve is rotatably arranged in the oil injection hole, a through hole is formed in the side surface of the oil injection valve, an oil pipe is connected to the outside of the oil injection valve, and a driving component is arranged at the rear side of the oil injection valve, the driving component drives the oil injection valve to rotate, thereby aligning the through hole with the corresponding oil injection groove, so as to perform oil injection operation on different oil injection grooves.

[0008] As a further scheme of the present application, the cross head body is provided with a bearing hole seat penetrating through the middle of the cross head body, and a connecting bearing is arranged in the bearing hole seat.

[0009] As a further scheme of the present application, the cross head body comprises a front and rear splicing structure, facilitating injection of an oil injection groove structure in the cross head body.

[0010] A production method of a flexible injection molding machine cross head for producing the flexible injection molding machine cross head as claimed in the claims, comprising the following steps: S1, forming the basic shape of the cross head front and rear splicing components by a casting machine respectively; S2, accurately processing the structure of each part of the cross head splicing component by using CNC milling, turning and drilling processes; S3, coating structural glue on the splicing surfaces of the two corresponding cross head splicing components, and then assembling the cross head body; S4, reinforcing the cross head body by using a welding process, and grinding off the welding bumps after the welding port is cooled; S5, fixing the cross head body by a detection clamping seat mechanism, and detecting whether each part meets the standard by laser target detection.

[0011] As a further scheme of the present application, the detection clamping seat mechanism comprises a fixed seat, a fixed frame is fixedly arranged on the fixed seat, side limiting assemblies for limiting the side surface of the cross head body are arranged on the two sides of the fixed frame, an upper limiting assembly for limiting the upper side of the cross head body is arranged on the upper side of the fixed frame, a lower limiting assembly for limiting the lower side of the cross head body is arranged on the lower side of the fixed frame, a front limiting assembly for limiting the front side of the cross head body is arranged on the front side of the fixed frame, and a rear blocking component for limiting the rear side of the cross head body is arranged.

[0012] As a further scheme of the present application, the side limiting assembly comprises a side fixed plate fixedly arranged on the side surface of the fixed frame, and a side limiting bolt is threadedly connected to the front end of the side fixed plate.

[0013] As a further scheme of the present application, the upper limiting assembly comprises an upper fixed block arranged on the upper side of the front surface of the fixed frame, an upper first limiting bolt is transversely threadedly connected to the upper fixed block, and an upper second limiting bolt is longitudinally threadedly connected to the upper fixed block.

[0014] As a further scheme of the present application, the lower limiting assembly comprises a lower fixed block fixedly arranged on the lower side of the front surface of the fixed frame, and a lower limiting bolt is transversely threadedly connected to the lower fixed block.

[0015] As a further scheme of the present application: the front limiting assembly comprises a front rotating column rotatably arranged on the upper fixing block or / and the lower fixing block, a front connecting plate is fixedly arranged on the front rotating column, a locking bolt is threadedly connected in the middle of the front connecting plate, and a pressing bolt is arranged at the end of the front connecting plate.

[0016] The present application has the following beneficial effects: 1. In the present application, the oil injection rotary valve rotatably arranged in the oil injection hole is connected with the oil pipe on the outside through a rotating seal, and the oil pipe delivers lubricating oil through an oil pump to provide power for oil injection. The driving motor drives the oil injection rotary valve to rotate, so that the through hole is accurately aligned with the corresponding oil injection groove. The oil injection groove in the inner side of the cross head body is connected with the sliding hole and the hinged hole, and the lubricating oil can flow into the key position. In a high temperature environment, this structure can automatically supply oil to the sliding hole and the hinged hole at regular intervals, effectively reducing wear and tear and reducing equipment failure rate.

[0017] 2. In the present application, the detection clamp seat mechanism constructs a full-range limiting system for the cross head body through the fixing seat, the fixing frame and each limiting assembly, so as to ensure the stability and accuracy of the cross head during detection. The laser alignment detection is based on the symmetrical structure of the cross head, and uses horizontal and vertical laser irradiation to make the light beams on both sides evenly distributed. The detection personnel can quickly judge whether the shape of the sliding arm and the hinged arm is symmetrical by comparing the distribution of the laser on both sides, and accurately find the thermal plastic deformation problem during production. It ensures that the quality of the cross head meets the standard, and improves the product qualification rate. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A flexible injection molding machine cross head overall structure schematic diagram is provided for the present application. Figure 2 A flexible injection molding machine cross head longitudinal section structure schematic diagram is provided for the present application. Figure 3 A flexible injection molding machine cross head laser alignment structure schematic diagram is provided for the present application. Figure 4 A flexible injection molding machine cross head detection clamp seat mechanism structure schematic diagram is provided for the present application. Figure 5 A flexible injection molding machine cross head detection clamp seat mechanism structure schematic diagram is provided for the present application.

[0019] Explanation of reference signs: 1. Crosshead body; 101. Sliding arm; 102. Hinge arm; 103. Bearing seat; 2. Oil injection mechanism; 201. Oil injection hole; 202. Oil injection rotary valve; 203. Oil injection groove; 3. Connecting bearing; 4. Detection clamp mechanism; 401. Fixed seat; 402. Fixed frame; 403. Side limit assembly; 4031. Side fixing plate; 4032. Side limit bolt; 404. Upper limit assembly; 4041. Upper fixing block; 4042. Upper first limit bolt; 4043. Upper second limit bolt; 405. Lower limit assembly; 4051. Lower fixing block; 4052. Lower limit bolt; 406. Front limit assembly; 4061. Front rotating column; 4062. Front connecting plate; 4063. Locking bolt; 4064. Pressing bolt; 407. Rear stop component. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] like Figures 1 to 5 As shown in the figure, an embodiment of the present invention provides a flexible injection molding machine crosshead, including a crosshead body 1. The crosshead body 1 adopts a symmetrical structure design, with sliding arms 101 symmetrically arranged on its upper and lower parts. The ends of the sliding arms 101 are provided with sliding holes that slide and cooperate with guide rails to ensure the stability and guidance of the crosshead during movement. Hinged arms 102 are provided on both sides of the crosshead body 1, and the ends of the hinged arms 102 are provided with hinge holes for interlocking and hinged with hinge frames. In actual operation, the two sets of hinge frames drive the crosshead body 1 to move back and forth through relative movement, thereby completing the conversion of reciprocating motion.

[0022] A lubrication mechanism 2 is provided on the crosshead body 1. The lubrication mechanism 2 includes an oil injection groove 203 extending inside the crosshead body 1, with each set of sliding holes and hinge holes corresponding to and connected to a set of oil injection grooves 203. This allows the oil injection grooves 203 to periodically provide lubricating oil to the sliding holes and hinge holes under high-temperature conditions, thereby effectively reducing wear and improving the service life of the equipment. An oil injection hole 201 is provided on the rear side of the crosshead body 1, which is interconnected with multiple sets of oil injection grooves 203, and the connection positions are arranged around the oil injection hole 201. An oil injection rotary valve 202 is rotatably installed inside the oil injection hole 201. A through hole is provided on the side of the oil injection rotary valve 202, and an oil pipe is rotatably sealed on its outer side. The oil pipe delivers lubricating oil to the oil injection rotary valve 202 through an oil pump, providing power for subsequent lubrication operations. A drive motor is installed on the rear side of the oil injection rotary valve 202. The drive motor can drive the oil injection rotary valve 202 to rotate, thereby driving the through hole to align with the corresponding oil injection groove 203, so as to achieve precise oil injection operation on different oil injection grooves 203.

[0023] In order to facilitate the arrangement of the oil injection groove 203 inside the cross head body 1, the cross head body 1 can adopt a front and rear splicing structure design. Specifically, the oil injection groove 203 can be arranged on one of the splicing components, and then the two splicing components are spliced together to form a complete cross head body 1. Thus, the machining process of the oil injection groove 203 is simplified. In addition, the bearing hole seat 103 is arranged through the middle of the cross head body 1, and the connecting bearing 3 is arranged inside the bearing hole seat 103, which provides stable support for the movement of the cross head.

[0024] For the production method of the flexible injection molding machine cross head described above, the present application also makes a detailed elaboration. The method includes the following steps: First, the basic shape of the cross head front and rear splicing components is formed by casting machine respectively. The basic size and shape of the cross head are ensured. Then, the CNC milling, turning and drilling precision machining process is used to accurately process the structure of each part of the cross head splicing component, and the preliminary machining operation is completed.

[0025] Next, structural adhesive is applied to the splicing surfaces of the two corresponding cross head splicing components, and then they are assembled into the cross head body 1. The use of structural adhesive can enhance the bonding force between the splicing components and improve the overall structural strength of the cross head. Then, the cross head body 1 is reinforced by welding process, and the welding nodule is polished after the welding port is cooled, and the splicing and fixing operation is completed. The welding process can further enhance the structural stability of the cross head, and ensure that it will not loosen or break during use.

[0026] After the splicing and fixing are completed, the cross head body 1 needs to be fixed by the detection clamp seat mechanism 4, and whether each part meets the standard is detected by laser aiming, and finally whether the size of each part of the cross head meets the drawing requirements is checked by using three coordinate measuring instrument, caliper and other tools, so as to complete the detection operation. The laser aiming detection is based on the symmetrical structure of the cross head body 1. Specifically, the cross head body 1 is fixed on the detection clamp seat mechanism 4, and then the cross head body 1 is uniformly distributed with light beams on both side edges by means of transverse and vertical laser irradiation. By detecting whether the shape of the detection slide arm 101 and the hinge arm 102 meets the symmetry requirement, it can be judged whether the cross head body 1 has the problem of thermal plastic deformation during production, so as to ensure the symmetry effect. For example, if thermal plastic deformation occurs during production, the lateral laser will be distributed asymmetrically on the cross head body 1. The detection personnel observes from the front side, compares the laser distribution on both sides of the cross head body 1, and then judges whether the cross head body 1 has deformation. This detection method has the characteristics of high efficiency and accuracy, which can ensure that the quality of the cross head meets the standard.

[0027] The laser ray irradiation device belongs to the prior art, and only needs to adjust the position of the laser ray irradiation device and then adjust the irradiation angle of the red ray during irradiation to meet the detection requirement, which will not be described herein.

[0028] For the detection clamp seat mechanism 4, it comprises a fixed seat 401, and a fixed frame 402 is fixedly arranged on the fixed seat 401. The fixed frame 402 is provided with a side limiting assembly 403 for limiting the side surface of the cross head body 1, an upper limiting assembly 404 for limiting the upper side of the cross head body 1, a lower limiting assembly 405 for limiting the lower side of the cross head body 1, a front limiting assembly 406 for limiting the front side of the cross head body 1, and a rear blocking component 407 for limiting the rear side of the cross head body 1. These limiting assemblies and the rear blocking component 407 jointly constitute a full-range limiting system for the cross head body 1, and ensure the stability and accuracy of the cross head body 1 during detection.

[0029] Further, the side limiting assembly 403 comprises a side fixed plate 4031 fixedly arranged on the side surface of the fixed frame 402, and a side limiting bolt 4032 threadedly connected to the front end of the side fixed plate 4031. The upper limiting assembly 404 comprises an upper fixed block 4041 arranged on the upper side of the front surface of the fixed frame 402, an upper first limiting bolt 4042 threadedly connected to the upper fixed block 4041 in a transverse direction, and an upper second limiting bolt 4043 threadedly connected to the upper fixed block 4041 in a longitudinal direction. The lower limiting assembly 405 comprises a lower fixed block 4051 fixedly arranged on the lower side of the front surface of the fixed frame 402, and a lower limiting bolt 4052 threadedly connected to the lower fixed block 4051 in a transverse direction. The front limiting assembly 406 comprises a front rotating column 4061 rotatably arranged on the upper fixed block 4041 or / and the lower fixed block 4051, a front connecting plate 4062 fixedly arranged on the front rotating column 4061, a locking bolt 4063 threadedly connected to the middle of the front connecting plate 4062, and a pressing bolt 4064 arranged at the end of the front connecting plate 4062. The designs of these limiting assemblies are consistent with the shape and size characteristics of the cross head body 1, and ensure the accuracy and stability of the limiting.

[0030] It should be noted that the side limiting bolt 4032, the upper first limiting bolt 4042, the upper second limiting bolt 4043 and the lower limiting bolt 4052 are all wrapped with plastic on the contact head of the cross head body 1. Thus, the surface of the cross head body 1 is protected from damage, and the cross head body 1 is facilitated to slide into the limiting bolts. The positions of these bolts only need to be adjusted when the size of the cross head body 1 to be detected changes. Thus, the versatility and flexibility of the detection clamp seat mechanism 4 are improved.

[0031] In use, the cross head body 1 is buckled between the side limiting assembly 403, the upper limiting assembly 404 and the lower limiting assembly 405, so that the contact ends of the side limiting bolt 4032, the upper limiting bolt 4042, the upper limiting bolt 4043 and the lower limiting bolt 4052 are in close contact with the cross head body 1, thereby preliminarily limiting the cross head body 1. Then, the front connecting plate 4062 is rotated to the front side of the cross head body 1, and the corresponding locking bolt 4063 is rotated, so that the end of the locking bolt 4063 abuts against the corresponding upper fixed block 4041 or / and the lower fixed block 4051, that is, the final positioning of the cross head body 1 is completed. Such positioning mode is stable and reliable, and is convenient for subsequent laser alignment operation.

[0032] Working principle: The cross head body 1 is provided with hinged arms 102 on both sides, the end of the hinged arm 102 has a hinge hole, and the hinge frame and the hinge hole are mutually inserted and hinged. When the two groups of hinge frames move relatively, the cross head body 1 is driven to move forward and backward, thereby completing the reciprocating motion required by the injection molding machine to work, and ensuring that the injection molding process can be orderly carried out according to the predetermined action.

[0033] The cross head body 1 is provided with an oil injection hole 201 on the rear side, and an oil injection valve 202 is rotatably arranged in the oil injection hole 201. The oil injection valve 202 is provided with a through hole on the side surface, and an oil pipe is rotatably and sealingly arranged outside the oil injection valve 202. The oil pipe delivers lubricating oil to the oil injection valve 202 through an oil pump to provide power for oil injection operation. A driving motor is arranged at the rear side of the oil injection valve 202 in a matching mode, and the driving motor can drive the oil injection valve 202 to rotate.

[0034] The cross head body 1 is provided with an oil injection groove 203 on the inner side, and each group of sliding holes and hinge holes is in communication with a group of oil injection grooves 203. The driving motor drives the oil injection valve 202 to rotate, so that the through hole on the side surface of the oil injection valve 202 is aligned with the corresponding oil injection groove 203. At this time, the lubricating oil enters the corresponding oil injection groove 203 through the oil injection hole 201 and the through hole of the oil injection valve 202, and then flows into the sliding hole and the hinge hole through the oil injection groove 203. Lubricating oil is regularly provided for these parts in a high temperature environment, effectively reducing wear and tear, and improving the service life of the equipment.

[0035] In the laser alignment detection, based on the symmetrical structure of the cross head body 1, the fixed cross head body 1 is irradiated by transverse and vertical lasers, so that the light beams are uniformly distributed on the two side edge portions of the cross head body 1. The detector observes from the front side, compares the laser distribution on both sides of the cross head body 1, judges whether the shapes of the sliding arm 101 and the hinged arm 102 meet the symmetry requirement, and further judges whether the cross head body 1 has thermal plastic deformation during production. If thermal plastic deformation occurs, the lateral laser will be distributed asymmetrically on the cross head body 1.

[0036] After the laser alignment detection is completed, whether the sizes of each part of the cross head meet the requirements of the drawing is checked by using a three-coordinate measuring instrument, a caliper and the like, so as to ensure that the quality of the cross head meets the standard.

[0037] The above disclosure is only several specific embodiments of the present application, but the embodiments of the present application are not limited thereto, and any changes that can be thought of by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A flexible injection molding machine crosshead, comprising a crosshead body (1), the crosshead body (1) is symmetrically provided with a sliding arm (101) on the upper and lower sides, the end of the sliding arm (101) is provided with a sliding hole matched with a guide sliding rail, the crosshead body (1) is provided with a hinged arm (102) on both sides, the end of the hinged arm (102) is provided with a hinge hole for mutual insertion and hinging with a hinge frame, and two groups of the hinge frames drive the crosshead body (1) to move forward and backward through relative movement, thereby completing the reciprocating motion conversion, characterized in that: The device further comprises an oil injection mechanism (2), the oil injection mechanism (2) comprises an oil injection groove (203) extending on the inner side of the crosshead body (1), each group of the sliding hole and the hinge hole is in corresponding communication with a group of the oil injection grooves (203), and the oil injection grooves (203) are used for regularly injecting oil into the sliding hole and the hinge hole in a high-temperature environment.

2. A flexible injection molding machine crosshead as in claim 1, wherein, An oil injection hole (201) in communication with a plurality of oil injection grooves (203) is formed on the rear side of the crosshead body (1), and the communication position is arranged around the oil injection hole (201), an oil injection rotary valve (202) is rotatably arranged in the oil injection hole (201), a through hole is formed in the side surface of the oil injection rotary valve (202), the oil injection rotary valve (202) is connected with an oil pipe, a driving component is arranged on the rear side of the oil injection rotary valve (202), the driving component drives the oil injection rotary valve (202) to rotate, thereby aligning the through hole with the corresponding oil injection groove (203), and thereby performing oil injection operation on different oil injection grooves (203).

3. A flexible injection molding machine crosshead as in claim 2 wherein, A bearing hole seat (103) is arranged through the crosshead body (1), and a connecting bearing (3) is arranged in the bearing hole seat (103).

4. A flexible injection molding machine crosshead as in claim 3 wherein, The crosshead body (1) comprises a front and rear splicing structure, which facilitates injection of the oil injection groove (203) structure in the crosshead body (1).

5. A method for producing a flexible injection molding machine crosshead for producing a flexible injection molding machine crosshead according to claim 4, characterized in that The method comprises the following steps: S1, respectively casting the basic shape of the crosshead front and rear splicing components by a casting machine; S2, accurately processing the structures of the crosshead splicing components by using CNC milling, turning and drilling processes; S3, coating structural glue on the splicing surfaces of the two corresponding crosshead splicing components, and then assembling the crosshead body (1); S4, reinforcing the crosshead body (1) by using a welding process, and grinding off the welding bumps after the welding port is cooled; S5, fixing the crosshead body (1) by using a detection clamp seat mechanism (4), and detecting whether each part meets the standard by laser target detection.

6. A method of producing a flexible injection molding machine crosshead as defined in claim 5, wherein, The detection clamp mechanism (4) comprises a fixed seat (401), a fixed frame (402) is fixedly arranged on the fixed seat (401), side limiting assemblies (403) for limiting the side of the cross head body (1) are arranged on both sides of the fixed frame (402), an upper limiting assembly (404) for limiting the upper side of the cross head body (1) is arranged on the upper side of the fixed frame (402), a lower limiting assembly (405) for limiting the lower side of the cross head body (1) is arranged on the lower side of the fixed frame (402), a front limiting assembly (406) for limiting the front side of the cross head body (1) is arranged on the front side of the fixed frame (402), and a rear limiting assembly (407) for limiting the rear side of the cross head body (1) is arranged on the rear side of the fixed frame (402).

7. A method of producing a flexible injection molding machine crosshead as defined in claim 6, wherein, The side limiting assembly (403) comprises a side fixed plate (4031) fixedly arranged on the side of the fixed frame (402), and a side limiting bolt (4032) is threadedly connected to the front end of the side fixed plate (4031).

8. A method of producing a flexible injection molding machine crosshead as defined in claim 7, wherein, The upper limiting assembly (404) comprises an upper fixed block (4041) arranged on the upper side of the front face of the fixed frame (402), an upper first limiting bolt (4042) is transversely threadedly connected to the upper fixed block (4041), and an upper second limiting bolt (4043) is longitudinally threadedly connected to the upper fixed block (4041).

9. A method of producing a flexible injection molding machine crosshead as defined in claim 8, wherein, The lower limiting assembly (405) comprises a lower fixed block (4051) fixedly arranged on the lower side of the front face of the fixed frame (402), and a lower limiting bolt (4052) is transversely threadedly connected to the lower fixed block (4051).

10. A method of producing a flexible injection molding machine crosshead as defined in claim 9, wherein, The front limiting assembly (406) comprises a front rotating column (4061) rotatably arranged on the upper fixed block (4041) or / and the lower fixed block (4051), a front connecting plate (4062) is fixedly arranged on the front rotating column (4061), a locking bolt (4063) is threadedly connected to the middle of the front connecting plate (4062), and a pressing bolt (4064) is arranged at the end of the front connecting plate (4062).

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