A semi-automatic molding device for rear mold casting blanks of injection molding machine accessories

Abstract

The present invention discloses a semi-automatic molding device for the blank of the rear template casting of an injection molding machine accessory, which relates to the technical field of casting, and includes a workbench, a sand box mechanism and a compacting mechanism. The workbench is an inverted U-shaped structure and has a pair of rectangular storage grooves symmetrically arranged on its top surface; the sand box mechanism includes a sand box body, a hydraulic cylinder and a fixed plate. The sand box body consists of a box bottom plate and two box side plates. The two box side plates are driven by the hydraulic cylinder to move toward each other and align with the upper side of the box bottom plate to achieve box closing. The two box side plates are driven by the hydraulic cylinder to move in the opposite direction and are correspondingly stored under the storage groove to further achieve box opening; the compacting mechanism includes a fixed plate 2, a hydraulic cylinder 2, a compacting tube and a compacting plate. The compacting tube and the compacting plate are driven by the hydraulic cylinder to squeeze the molding sand in the sand box body downward, and squeeze out the core mold. The molding device in the present invention has the characteristics of reasonable scheme, ingenious structure, convenient use and saving trouble and labor.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to a semi-automatic molding device for a rear template casting blank of an injection molding machine accessory. Background Art

[0002] At present, plastic products used in our daily life, such as toys, control panels of household appliances, etc., are usually formed by injection molding machines and matched with molds of specific shapes. As one of the important parts of injection molding machines, the rear mold plate of the injection molding machine is usually made by casting technology, but due to its relatively complex structure, there is also a core mold in the molding cavity during actual casting.

[0003] The production of core molds involves the application of semi-automatic molding equipment, which is as follows: place the sand box on the equipment, pour the molding sand into the sand box, shake the equipment to shake off the excess molding sand, then compact the molding sand, and then use a pneumatic dust removal gun to remove the excess molding sand, and finally remove the sand box with the molding sand. However, due to the large size and heavy weight of the rear template of the injection molding machine, the sand box used is large in size and the prepared core mold is heavy, making it very troublesome and laborious to manually carry the sand box and the core mold, as well as to manually remove the sand box, which greatly restricts the production efficiency of the enterprise and greatly increases the labor cost. Summary of the invention

[0004] The object of the present invention is to provide a semi-automatic molding device for a rear template casting blank of an injection molding machine accessory, so as to solve the above-mentioned defects caused by the prior art.

[0005] A semi-automatic molding device for a rear mold casting blank of an injection molding machine accessory comprises a workbench, a sand box mechanism and a compacting mechanism, wherein:

[0006] The workbench is an inverted U-shaped structure and has a pair of rectangular storage slots symmetrically arranged on its top surface;

[0007] The sand box mechanism comprises a sand box body, a hydraulic cylinder and a fixed plate. The sand box body consists of a box bottom plate and two box side plates. The hydraulic cylinder is arranged below the workbench through the fixed plate. The hydraulic cylinder drives the two box side plates to move toward each other and align them with the upper side of the box bottom plate, thereby closing the box. The hydraulic cylinder drives the two box side plates to move in the opposite direction and store them correspondingly below the storage groove, thereby opening the box.

[0008] The compacting mechanism includes a second fixed plate, a second hydraulic cylinder, a compacting pipe and a compacting plate. The second hydraulic cylinder is arranged above the workbench through the second fixed plate. The compacting pipe and the compacting plate are driven by the hydraulic cylinder to squeeze the molding sand in the sand box body downward, forming a square block part of the core mold in the sand box body, and simultaneously forming a round block just above the square block.

[0009] Preferably, the box bottom plate is placed flat on the top surface of the workbench in the center, and the two box side plates are symmetrically distributed on the left and right sides of the box bottom plate, the hydraulic cylinder is provided with a pair and is symmetrically distributed on the left and right sides, the hydraulic cylinder is vertically installed on the side of the workbench through a fixed plate, and is vertically connected with a lifting frame at the end of its piston rod, and a pair of guide pillars are symmetrically connected at the bottom of the lifting frame, and the guide pillar is slidably connected with the fixed plate through a guide sleeve, a fixed frame is provided in parallel on the side of the lifting frame, and two pairs of hinge strips are connected in parallel between the two, the box side plates on the same side are installed on the side of the fixed frame, a connecting plate is welded in the center of the top of the lifting frame, and a compression spring is connected between the connecting plate and the adjacent box side plates, the workbench is connected with an F-shaped guide strip at the rear of the storage slot, the guide strip is provided with an inverted L-shaped guide slot, the guide column is vertically connected to the fixed frame at the rear, the guide column on the same side is slidably connected to the guide slot, and a pair of vibration motors are symmetrically installed on the outside of the box bottom plate.

[0010] Preferably, the hydraulic cylinder 2 is vertically installed downward on the upper side of the workbench through the fixed plate 2, and is coaxially connected to the upper compacting tube at the end of its piston rod. The compacting plate is horizontally fixed to the lower end of the compacting tube, and a plurality of guide columns 2 are evenly connected on the compacting plate. The guide columns 2 are slidably connected to the fixed plate 2 through the guide sleeve 2.

[0011] Preferably, a pair of conical positioning holes are symmetrically provided on the top surface of the workbench, and a pair of conical positioning cones are symmetrically connected to the lower side of the box bottom plate, and the positioning cones on the same side are coaxially inserted into the positioning holes.

[0012] Preferably, a plurality of lifting rings are evenly connected to the upper side of the box bottom plate.

[0013] Preferably, a C-shaped cleaning tube is symmetrically provided below the workbench, and the cleaning tube is installed on the top of the workbench through a pair of clamping pieces. The cleaning tube is evenly provided with blowing holes facing the inner side of the box side panel, and air guide tubes are connected to both ends of the cleaning tube.

[0014] Preferably, two straight cleaning tubes are evenly provided on the edges of the compacting plate. The two cleaning tubes are installed on the upper side of the compacting plate through a pair of clamping frames. Two blowing holes are evenly provided on the two cleaning tubes facing the upper side of the box bottom plate. Two air guide tubes are connected to both ends of the two cleaning tubes.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention uses a lifting device in conjunction with a lifting device structure to horizontally lift the empty box bottom plate onto the top surface of the workbench, and uses the cooperation between the positioning cone and the positioning hole to achieve rapid positioning between the box bottom plate and the workbench. The sand box body can be closed by driving the two box side plates toward each other and aligned with the upper side of the box bottom plate through a hydraulic cylinder, and the sand box body can be opened by driving the two box side plates to move in the opposite direction and correspondingly store them under the storage slot through a hydraulic cylinder.

[0017] 2. The present invention puts excess molding sand into the sand box body through a filling device or manually, and uses a vibration motor to help fill the molding sand and fill the sand box body. Then, the piston rod of the second hydraulic cylinder extends and drives the compaction pipe and the compaction plate to squeeze the molding sand in the sand box body downward, forming a square block part of the core mold in the sand box body, and simultaneously forming a round block directly above the square block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0019] Figure 2 It is a schematic structural diagram of the overall front view of the present invention.

[0020] Figure 3 and Figure 4 It is a structural schematic diagram of the sand box mechanism in the present invention from different perspectives.

[0021] Figure 5 It is a structural schematic diagram of the box bottom plate in the sand box mechanism.

[0022] Figure 6 It is a structural schematic diagram of the box side plate in the sand box mechanism.

[0023] Figure 7 It is a schematic diagram of the structure of the cleaning tube 1 in the sand box mechanism.

[0024] Figure 8 It is a structural schematic diagram of the compacting mechanism in the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure of the cleaning pipe 2 in the compacting mechanism.

[0026] Fig.10 It is a structural schematic diagram of the rear mold plate and the core mold of the injection molding machine in the present invention.

[0027] in:

[0028] 10-working table; 10a-storage slot; 10b-positioning hole;

[0029] 20-sand box mechanism; 201-box bottom plate; 202-lifting ring; 203-positioning cone; 204-box side plate; 205-hydraulic cylinder one; 206-fixed plate one; 207-lifting frame; 208-guide column one; 209-guide sleeve one; 210-fixed frame; 211-hinge strip; 212-connecting plate; 213-compression spring; 214-guide strip; 214a-guide groove; 215-guide column; 216-forming plate; 217-vibration motor; 218-cleaning tube one; 218a-blowing hole one; 219-card-mounted sheet; 220-air guide tube one;

[0030] 30-compacting mechanism; 301-fixing plate 2; 302-hydraulic cylinder 2; 303-compacting pipe; 304-compacting plate; 305-guide column 2; 306-guide sleeve 2; 307-cleaning pipe 2; 307a-blowing port 2; 308-card mounting frame; 309-air guide pipe 2;

[0031] 40-injection molding machine rear template;

[0032] 50-core mold; 501-round block; 502-square block; 502a-molding groove. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figures 1 to 10 As shown, a semi-automatic molding device for a blank of a rear mold casting of an injection molding machine accessory comprises a workbench 10, a sand box mechanism 20 and a compacting mechanism 30, wherein:

[0035] The workbench 10 is an inverted U-shaped structure and has a pair of rectangular storage grooves 10a symmetrically disposed on its top surface;

[0036] The sand box mechanism 20 includes a sand box body, a hydraulic cylinder 205 and a fixed plate 206. The sand box body is composed of a box bottom plate 201 and two box side plates 204. The hydraulic cylinder 205 is arranged below the workbench 10 through the fixed plate 206. The hydraulic cylinder 205 drives the two box side plates 204 to move toward each other and align them with the upper side of the box bottom plate 201, thereby realizing the closing of the box. The hydraulic cylinder 205 drives the two box side plates 204 to move in the opposite direction and be correspondingly stored under the storage groove 10a, thereby realizing the opening of the box.

[0037] The compacting mechanism 30 includes a second fixed plate 301, a second hydraulic cylinder 302, a compacting pipe 303 and a compacting plate 304. The second hydraulic cylinder 302 is arranged above the workbench 10 through the second fixed plate 301. The hydraulic cylinder 302 drives the compacting pipe 303 and the compacting plate 304 to squeeze the molding sand in the sand box body downward, forming a square block 502 part of the core mold 50 in the sand box body, and simultaneously forming a round block 501 directly above the square block 502.

[0038] In this embodiment, the box bottom plate 201 is placed flat on the top surface of the workbench 10 in the center, and the two box side plates 204 are symmetrically distributed on the left and right sides of the box bottom plate 201. The hydraulic cylinder 1 205 is provided with a pair and is symmetrically distributed on the left and right sides. The hydraulic cylinder 1 205 is vertically installed on the side of the workbench 10 through a fixed plate 1 206, and a lifting frame 207 is vertically connected to the end of its piston rod. A pair of guide pillars 1 208 are symmetrically connected at the bottom of the lifting frame 207. The guide pillars 1 208 are slidably connected to the fixed plate 1 206 through a guide sleeve 1 209. A fixed frame 210 is parallel to the side of the lifting frame 207, and a parallel connection is made between the two. There are two pairs of hinged bars 211, and the box side panels 204 on the same side are installed on the side of the fixed frame 210. A connecting plate 212 is welded in the center of the top of the lifting frame 207, and a compression spring 213 is connected between the connecting plate 212 and the adjacent box side panel 204. The workbench 10 is connected to an f-shaped guide bar 214 at the rear of the storage groove 10a, and the guide bar 214 is provided with an inverted L-shaped guide groove 214a. A guide column 215 is vertically connected to the fixed frame 210 at the rear, and the guide column 215 on the same side is slidably connected in the guide groove 214a. A pair of vibration motors 217 are symmetrically installed on the outer side of the box bottom plate 201.

[0039] In this embodiment, the hydraulic cylinder 2 302 is vertically installed downward on the upper side of the workbench 10 through the fixed plate 2 301, and is coaxially connected to the upper compacting tube 303 at the end of its piston rod. The compacting plate 304 is horizontally fixed to the lower end of the compacting tube 303, and a plurality of guide pillars 2 305 are evenly connected to the compacting plate 304. The guide pillars 2 305 are slidably connected to the fixed plate 301 through the guide sleeve 2 306.

[0040] In this embodiment, a pair of conical positioning holes 10b are symmetrically arranged on the top surface of the workbench 10, and a pair of conical positioning cones 203 are symmetrically connected to the lower side of the box bottom plate 201, and the positioning cones 203 on the same side are coaxially inserted into the positioning holes 10b. Through the coaxial cooperation between the positioning cones 203 and the positioning holes 10b, the box bottom plate 201 can be quickly positioned on the top surface of the workbench 10.

[0041] In this embodiment, the upper side of the box bottom plate 201 is evenly connected with a plurality of lifting rings 202. The box bottom plate 201 with the lifting rings 202 is hoisted by the lifting equipment in conjunction with the lifting device structure, which is convenient for hoisting the empty box bottom plate 201 to the top surface of the workbench 10, and for hoisting the box bottom plate 201 with the core mold 50 from the top surface of the workbench 10.

[0042] In this embodiment, a C-shaped cleaning pipe 218 is symmetrically arranged below the workbench 10, and the cleaning pipe 218 is installed on the top of the workbench 10 through a pair of card-mounted pieces 219. The cleaning pipe 218 is evenly provided with air blowing holes 218a facing the inner side of the box side plate 204, and air guide pipes 220 are connected to both ends of the cleaning pipe 218. When the box side plate 204 moves downward, high-pressure gas is first introduced into the cleaning pipe 218 through the air guide pipe 220, and then a high-speed airflow is ejected through the air blowing holes 218a on the cleaning pipe 218, and the inner side of the box side plate 204 is automatically cleaned to prevent the inner surface of the box side plate 204 from being attached with molding sand.

[0043] In this embodiment, straight cleaning pipes 307 are evenly arranged around the edges of the compacting plate 304. The cleaning pipes 307 are mounted on the upper side of the compacting plate 304 through a pair of clamping frames 308. The cleaning pipes 307 are evenly provided with blowing holes 307a facing the upper side of the box bottom plate 201. Both ends of the cleaning pipes 307 are connected with air guide pipes 309. When the sand box is opened, high-pressure gas is first introduced into the cleaning pipes 307 through the air guide pipes 309, and then a high-speed airflow is ejected through the blowing nozzles 307a on the cleaning pipes 307, and the upper side of the box bottom plate 201 and the top surface of the workbench 10 are automatically cleaned. When filling and compacting the molding sand, a part of the molding sand will inevitably fall on the upper side of the box bottom plate 201. Before placing the next box bottom plate 201, it is necessary to manually clean the workbench 10 and the box bottom plate 201 with a pneumatic dust blowing gun.

[0044] In this embodiment, a molding plate 216 is horizontally fixed to the lower side of the box side plate 204 . The molding plate 216 is cantilevered inward and is used to form a molding groove 502a at the bottom of the square block 502 when preparing the core mold 50 .

[0045] The working principle of this semi-automatic molding device for the blank of the rear template casting of injection molding machine accessories:

[0046] S1: The empty box bottom plate 201 is hoisted horizontally to the top surface of the workbench 10 by means of the hoisting equipment and the hoisting structure, and the box bottom plate 201 and the workbench 10 are quickly positioned with the help of the cooperation between the positioning cone 203 and the positioning hole 10b;

[0047] S2: The piston rods of the hydraulic cylinders 205 on both sides extend and push the corresponding lifting frames 207 to move upward, and the fixed frames 210 on both sides are guided by the corresponding guide grooves 214a to move vertically first and then horizontally. At the same time, the box side plates 204 on both sides first rise vertically to the upper side of the workbench 10, and then move towards each other and align to the upper side of the box bottom plate 201, so as to realize the closing of the sand box body;

[0048] S3: Excessive molding sand is put into the sand box body by means of a filling device or manually, and the vibration motor 217 is used to help fill the molding sand and fill the sand box body, and then the piston rod of the second hydraulic cylinder 302 is extended to drive the compaction tube 303 and the compaction plate 304 to squeeze the molding sand in the sand box body downward, forming a square block 502 of the core mold 50 in the sand box body, and simultaneously forming a round block 501 just above the square block 502, and then the piston rod of the second hydraulic cylinder 302 is contracted to drive the compaction tube 303 and the compaction plate 304 to return to the initial height upward;

[0049] S4: The piston rods of the hydraulic cylinders 205 on both sides are contracted and push the corresponding lifting frames 207 to move downward, and the fixed frames 210 on both sides are guided by the corresponding guide grooves 214a to first move horizontally and then move vertically. At the same time, the box side plates 204 on both sides first move in the opposite direction and away from the top of the box bottom plate 201, and then vertically descend to the lower side of the workbench 10 to realize the opening of the sand box body. During the opening, a high-speed airflow is ejected through the blowing hole 218a on the cleaning pipe 218, and the inner side of the box side plate 204 is automatically cleaned. A high-speed airflow is ejected through the blowing nozzle 307a on the cleaning pipe 307, and the upper side of the box bottom plate 201 and the top surface of the workbench 10 are automatically cleaned.

[0050] S5: The box bottom plate 201 carrying the core mold 50 is lifted from the top surface of the workbench 10 by means of a lifting device in cooperation with a lifting device structure, and transferred to a predetermined storage position, and then another empty box bottom plate 201 is lifted horizontally to the top surface of the workbench 10 .

[0051] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A semi-automatic molding device for the blank of the rear mold casting of injection molding machine accessories, characterized in that: It comprises a workbench (10), a sand box mechanism (20) and a compacting mechanism (30), wherein: The workbench (10) is an inverted U-shaped structure and has a pair of rectangular storage grooves (10a) symmetrically arranged on its top surface; The sand box mechanism (20) comprises a sand box body, a hydraulic cylinder (205) and a fixed plate (206); the sand box body comprises a box bottom plate (201) and two box side plates (204); the hydraulic cylinder (205) is arranged below the workbench (10) through the fixed plate (206); the hydraulic cylinder (205) drives the two box side plates (204) to move towards each other and align with the upper side of the box bottom plate (201), thereby achieving box closing; the hydraulic cylinder (205) drives the two box side plates (204) to move in the opposite direction and be correspondingly stored below the storage groove (10a), thereby achieving box opening; The compacting mechanism (30) comprises a second fixed plate (301), a second hydraulic cylinder (302), a compacting pipe (303) and a compacting plate (304); the second hydraulic cylinder (302) is arranged above the workbench (10) via the second fixed plate (301); the compacting pipe (303) and the compacting plate (304) are driven by the hydraulic cylinder (302) to press the molding sand in the sand box downward, thereby forming a square block (502) portion of the core mold (50) in the sand box, and simultaneously forming a round block (501) directly above the square block (502); The box bottom plate (201) is placed flat on the top surface of the workbench (10) in the center, and the two box side plates (204) are symmetrically distributed on the left and right sides of the box bottom plate (201). The hydraulic cylinder (205) is provided with a pair and is symmetrically distributed on the left and right sides. The hydraulic cylinder (205) is vertically upwardly installed on the side of the workbench (10) through the fixing plate (206), and a lifting frame (207) is vertically connected to the end of its piston rod. The bottom of the lifting frame (207) is symmetrically connected A pair of guide posts (208) are provided, and the guide posts (208) are slidably connected to the fixed plate (206) through a guide sleeve (209). A fixed frame (210) is provided parallel to the side of the lifting frame (207), and two pairs of hinge strips (211) are connected in parallel between the two. The box side plate (204) located on the same side is installed on the side of the fixed frame (210). A connecting plate (212) is welded in the center of the top of the lifting frame (207), and a connecting plate (212) is provided on the connecting plate (211). A compression spring (213) is connected between the box side plate (204) and the adjacent box side plate (12); the workbench (10) is connected to an f-shaped guide bar (214) at the rear of the storage groove (10a); the guide bar (214) is provided with an inverted L-shaped guide groove (214a); a guide column (215) is vertically connected to the rear fixed frame (210); the guide column (215) located on the same side is slidably connected to the guide groove (214a); the box bottom plate (201 ) is symmetrically mounted on the outside of the box, a pair of vibration motors (217) are symmetrically mounted on the left and right sides of the workbench (10), a C-shaped cleaning pipe (218) is symmetrically mounted below the workbench (10), the cleaning pipe (218) is mounted on the top of the workbench (10) via a pair of clamping pieces (219), the cleaning pipe (218) is evenly mounted with air blowing holes (218a) facing the inside of the box side plate (204), and air guide pipes (220) are connected to both ends of the cleaning pipe (218); The second hydraulic cylinder (302) is vertically mounted downward on the upper side of the workbench (10) through the second fixing plate (301), and is coaxially connected to the compacting tube (303) at the end of its piston rod. The compacting plate (304) is horizontally fixed to the lower end of the compacting tube (303). The compacting plate (304) is evenly connected to a plurality of second guide pillars (305). The second guide pillars (305) are slidably connected to the second fixing plate (301) through the second guide sleeve (306). Straight second cleaning tubes (307) are evenly arranged on the edges of the compacting plate (304). The second cleaning tube (307) is mounted on the upper side of the compacting plate (304) through a pair of clamping frames (308). The second cleaning tube (307) is evenly provided with two blowing holes (307a) facing the upper side of the box bottom plate (201). Both ends of the second cleaning tube (307) are connected to two air guide tubes (309).

2. The semi-automatic molding device for rear mold casting blank of injection molding machine accessories according to claim 1, characterized in that: A pair of conical positioning holes (10b) are symmetrically provided on the top surface of the workbench (10), and a pair of conical positioning cones (203) are symmetrically connected to the lower side of the box bottom plate (201), and the positioning cones (203) on the same side are coaxially inserted into the positioning holes (10b).

3. The semi-automatic molding device for rear mold casting blank of injection molding machine accessories according to claim 1, characterized in that: A plurality of lifting rings (202) are evenly connected to the upper side of the box bottom plate (201).

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