CN113246388B

CN113246388B - Injection mold for cup body shell of soybean milk machine

Info

Publication number: CN113246388B
Application number: CN202110338994.8A
Authority: CN
Inventors: 宋士刚; 陈宽
Original assignee: Zhijiang College of ZJUT
Current assignee: Zhijiang College of ZJUT
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2023-01-17
Anticipated expiration: 2041-03-30
Also published as: CN113246388A

Abstract

The invention discloses an injection mold for a cup body shell of a soybean milk machine, which comprises a fixed mold assembly and a movable mold assembly, wherein the fixed mold assembly comprises a fixed mold pressing plate and a fixed mold plate, a first sliding block and a second sliding block are symmetrically arranged in the fixed mold plate, and the bottoms of the first sliding block and the second sliding block are respectively and fixedly provided with an L-shaped first drag hook; the opposite sides of the first sliding block and the second sliding block are respectively provided with a cavity groove, and the side walls of the handle forming opening of the first sliding block and the second sliding block are respectively provided with a first side hole mold core corresponding to each other; the movable mold assembly sequentially comprises a movable mold pressing plate, a movable mold plate and a push plate, wherein the movable mold plate is provided with a mold core, and the push plate is provided with a lateral core-pulling mechanism for molding a second side hole; a draw hook groove corresponding to the first draw hook is formed in the push plate, and a second draw hook matched with the first draw hook is arranged in the draw hook groove; according to the soybean milk maker shell, the first side hole and the second side hole of the soybean milk maker shell are formed through reasonable core pulling layout, and conflict in spatial layout is avoided.

Description

Injection mold for cup body shell of soybean milk machine

Technical Field

The invention relates to the technical field of soybean milk machine forming molds, in particular to an injection mold for a cup body shell of a soybean milk machine.

Background

With the rapid development of the plastic industry today, the plastic molding industry has already moved to a high-speed stage. The traditional mould design method is mainly based on an empirical design method and lacks of design efficiency. The traditional design scheme of the injection mold is drawn up and tested depending on long-term accumulated experience and diligent trial, the method is easy to cause the problems that the rework workload of the mold is large, the rejection rate is high, the design and manufacturing period of the mold is long, the selection process of materials and the design scheme cannot be comprehensively analyzed and evaluated, the product quality cannot reach the optimum, the places in the molding process can be improved, the optimum process parameters cannot be found out and the like, and the technical progress and the market competitiveness are influenced. Therefore, it is urgently needed to integrate the application of computer-aided technology into the whole mold design stage, so as to reduce the workload of designers, improve the design efficiency and ensure the design quality.

Disclosure of Invention

The invention aims to provide an injection mold for a cup body shell of a soybean milk machine, and aims to solve the problems in the prior art in the background technology.

The technical problem of the invention is mainly solved by the following technical scheme: an injection mold for a cup body shell of a soybean milk machine comprises a cylinder wall and a handle, wherein a through hole between the inner side of the handle and the cylinder wall is defined as a first side hole, a concave surface at the outer side of the handle is defined as a second side hole, and the cylinder wall is in a cylindrical shape with a small upper part and a big lower part; the injection mold comprises a fixed mold component and a movable mold component, and the movable mold component can move linearly relative to the fixed mold component;

the fixed die assembly comprises a fixed die pressing plate and a fixed die plate, wherein a pouring gate is arranged on the fixed die pressing plate and communicated with a pouring gate runner; a first sliding block and a second sliding block are symmetrically arranged in the fixed template, the first sliding block and the second sliding block are respectively arranged in the fixed template in an obliquely sliding manner through dovetail grooves, and the bottoms of the first sliding block and the second sliding block are respectively fixedly provided with an L-shaped first drag hook; the opposite sides of the first sliding block and the second sliding block are respectively provided with a cavity groove, so that a cavity is formed after the first sliding block and the second sliding block are in opposite contact, one side of the cavity is provided with a handle forming opening with the width equivalent to that of a handle, and the side walls of the handle forming opening of the first sliding block and the second sliding block are respectively provided with a first side hole mold core corresponding to each other;

the movable die assembly sequentially comprises a movable die pressing plate, a movable die plate and a push plate, wherein a die core corresponding to the die cavity is arranged on the movable die plate, and a lateral core-pulling mechanism for forming a second side hole is arranged on the push plate; a draw hook groove corresponding to the first draw hook is formed in the push plate, and a second draw hook matched with the first draw hook is arranged in the draw hook groove;

the injection molding device comprises a cavity, a core, a first side hole core and a lateral core pulling mechanism, wherein the cavity, the core, the first side hole core and the lateral core pulling mechanism can form an injection molding cavity, and the sprue runner is communicated with the injection molding cavity.

Preferably, the lateral core pulling mechanism comprises a hydraulic cylinder, a push block and a second side hole forming block, the push block is connected with the output end of the hydraulic cylinder, the push block is fixedly connected with the second side hole forming block, and the second side hole forming block corresponds to the handle forming opening during die assembly.

Preferably, the fixed die plate is provided with an inclined guide post, the first slide block and the second slide block are respectively provided with an inclined guide groove corresponding to the inclined guide post, and a compression spring is arranged between the inclined guide post and the inclined guide groove.

Preferably, the opposite sides of the first slider and the second slider are respectively provided with at least one positioning projection and a positioning groove which correspond to each other.

Preferably, the first side hole mold cores of the first sliding block and the second sliding block are respectively provided with a positioning bump and a positioning groove which correspond to each other.

Preferably, the movable die assembly is provided with a plurality of guide pillars, and the fixed die assembly is provided with a guide sleeve matched with the guide pillars, so that the movable die assembly can linearly move relative to the fixed die assembly along the guide pillars.

Preferably, the sprue runner adopts a multi-point pouring mode after flow splitting, and pouring points are centrosymmetric.

Preferably, the number of the pouring points is two.

Preferably, a plurality of cooling water flow passages are arranged in the mold core.

Compared with the prior art, the invention has the advantages that: according to the invention, through reasonable core-pulling layout, the molding of the first side hole and the second side hole of the soybean milk maker shell is realized, the conflict in space layout is avoided, and the characteristics of the side holes are combined, the surface of the first side hole is connected with the cup body, the curved surface shape is compactly connected, and the inclined guide pillar in the mechanical core-pulling is adopted for core-pulling; the shape of the second side hole forming surface is complex, and a hydraulic side core-pulling mechanism is adopted. Meanwhile, the optimal design is carried out on the pouring point of the die by combining the die flow simulation analysis result.

Drawings

Fig. 1 is a schematic sectional view of the structure of the present invention.

Fig. 2 is a schematic cross-sectional structural view from another perspective of the present invention.

Fig. 3 is a schematic structural view of the article of the present invention.

Fig. 4 is a schematic structural view of a first slider and a second slider in the present invention.

FIG. 5 is a schematic view of the clamping of the first and second slides of the present invention.

FIG. 6 is a schematic drawing (I) of the clamping of the first slide in accordance with the present invention.

Fig. 7 is a schematic diagram (ii) of mold clamping of the first slide in the present invention.

Fig. 8 is a schematic diagram (iii) of mold clamping of the first slide in the present invention.

Fig. 9 is a schematic structural view of the guide post and the guide sleeve of the present invention.

FIG. 10 is a diagram showing the simulation of the weld marks at different glue injection points in the present invention.

FIG. 11 is a simulation diagram of the deformation of different glue injection points in the present invention.

In the figure: 100. a cylinder wall; 200. a handle; 300. a first side hole; 400. a second side hole; 1. fixing a die pressing plate; 2. fixing a template; 3. a first slider; 4. a second slider; 5. a dovetail groove; 6. a cavity groove; 7. a cavity; 8. a first side hole mold core; 9. a handle forming opening; 10. moving the die pressing plate; 11. moving the template; 12. pushing the plate; 13. a core; 14. a hydraulic cylinder; 15. a push block; 16. a second side hole forming block; 17. a first draw hook; 18. a hook pulling groove; 19. a second draw hook; 20. an inclined guide post; 21. an inclined guide groove; 22. a compression spring; 23. positioning the bump; 24. positioning a groove; 25. a guide post; 26. a guide sleeve; 27. a gate; 28. a sprue runner; 29. a cooling water flow passage.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further specifically described by embodiments in conjunction with the accompanying drawings.

The embodiment is as follows: the utility model provides a soybean milk machine cup shell injection mold, as shown in fig. 1-9, soybean milk machine cup shell includes section of thick bamboo wall 100 and handle 200 in this embodiment, and the through-hole between the inboard of handle 200 and section of thick bamboo wall 100 is defined as first side hole 300, and the concave surface in the handle 200 outside is defined as second side hole 400, and section of thick bamboo wall 100 is big end down's cylindric, and the top diameter slightly is less than the bottom diameter, and this shape is comparatively general and guaranteed certain drawing of patterns inclination, is favorable to the drawing of patterns of vertical direction. In the embodiment, the vertical placement is selected as the mold filling position, so that the melt flow filling is facilitated; the lower end surface of the parting surface is selected, the position of the sprue can be arranged at the position of the upper end surface, molten plastic flows in from the upper end surface, and when the cavity is filled, gas in the cavity is discharged from the parting surface at the lower end surface. The arrangement can ensure that the melt is fully filled and simultaneously has good exhaust effect without additionally arranging a special exhaust device.

Injection mold includes cover half subassembly and movable mould subassembly, is equipped with a plurality of guide pillars 25 on the movable mould subassembly, and the cover half subassembly is equipped with the guide pin bushing 26 that matches with guide pillar 25 for the movable mould subassembly can reciprocate along the relative cover half subassembly of guide pillar 25.

The fixed die assembly comprises a fixed die pressing plate 1 and a fixed die plate 2, a first sliding block 3 and a second sliding block 4 are arranged in the fixed die plate 2, the first sliding block 3 and the second sliding block 4 are symmetrically arranged and can be obliquely and slidably arranged in the fixed die plate 2 through dovetail grooves 5 respectively, and when the two move in the vertical direction, the two can be relatively close to or far away from each other at the same time. Opposite sides of the first sliding block 3 and the second sliding block 4 are respectively provided with a cavity groove 6, so that the first sliding block and the second sliding block are relatively close to each other until the first sliding block and the second sliding block are contacted with each other to form a cavity 7, and the shape of the cavity 7 is matched with that of the cylinder wall 100; when the first slider 3 and the second slider 4 are contacted, one sides of the cavity grooves 6 are contacted with each other, and a gap is left on the other side of the cavity grooves 6, the width of the gap is equivalent to that of the handle 200, and a handle forming opening 9 is formed; and the two side walls of the handle forming opening 9 are respectively provided with a first side hole die core 8 which correspond to each other, when the first sliding block 3 and the second sliding block 4 are contacted, the first side hole die cores 8 of the first sliding block 3 and the second sliding block 4 are also contacted with each other, and the formed shape is matched with the shape of the first side hole 300.

The movable mould subassembly includes movable mould clamp plate 10 from supreme down in proper order, movable mould board 11 and push pedal 12, be equipped with the core 13 that corresponds with the die cavity on the movable mould board 11, be equipped with the fashioned side direction of second side hole of being used for on the push pedal 12 and pull the mechanism, the side direction mechanism of pulling the core includes pneumatic cylinder 14, ejector pad 15 and second side hole shaping piece 16, ejector pad 15 is connected with pneumatic cylinder 14's output, ejector pad 15 and second side hole shaping piece 16 fixed connection, second side hole shaping piece 16 matches with the shaping face of second side hole 400, second side hole shaping piece 16 corresponds with handle shaping opening 9 during the compound die.

In the structure, the first draw hook 17 of L shape is fixed respectively to the bottom of first slider 3 and second slider 4, offers the draw hook groove 18 that corresponds with first draw hook 17 on the push pedal 12, is equipped with the second draw hook 19 that matches with first draw hook 17 in the draw hook groove 18, and the shape of second draw hook 19 is the shape of falling L. In addition, in order to ensure a sufficient side core pulling distance during demolding, in this embodiment, the fixed die plate 2 is provided with an inclined guide pillar 20, the first slider 3 and the second slider 4 are respectively provided with an inclined guide groove 21 corresponding to the inclined guide pillar 20, the inclined guide pillar 20 is sleeved with a compression spring 22, and two ends of the compression spring 22 are respectively connected with the inclined guide pillar 20 and the inclined guide groove 21.

In this embodiment, two sets of positioning protrusions 23 and positioning grooves 24 are respectively disposed on opposite sides of the first slider 3 and the second slider 4, wherein one set of positioning protrusions 23 and positioning grooves 24 are disposed on the first side hole mold core 8, which facilitates positioning of the first slider 3, the second slider 4, and the first side hole mold core 8 of the two when the mold is closed.

In the embodiment, when the die is closed, the die cavity 7, the die core 13, the first side hole die core 8 and the second side hole forming block 16 form an injection molding cavity, the gating system of the embodiment adopts two-point gating, specifically, the gate 27 is arranged on the fixed die pressing plate 1, the gate 27 is communicated with the gate runner 28, and the gate runner 28 is divided into two runners communicated with the injection molding cavity and symmetrically arranged at the gating point.

The core 13 of the present embodiment is provided with a plurality of cooling water passages 29 to constitute a circulating cooling system.

In the embodiment, when the die is closed, the fixed die plate is firstly moved to be closed, the first draw hook 17 enters the draw hook groove 18 on the push plate, the first slide block 3 and the second slide block 4 are pushed to move upwards and simultaneously approach each other, the compression spring 22 is compressed until the first draw hook 17 and the second draw hook 19 are fastened with each other, and the first slide block 3 and the second slide block 4 are contacted; then the hydraulic cylinder 14 works to push the second side hole forming block 16, and the mold closing before injection molding is finished.

In the embodiment, when the mold is opened, the movable mold plate and the fixed mold plate are separated, the first slide block 3 and the second slide block 4 move downwards and are away from each other under the action of the second draw hook 19 on the first draw hook 17 and the compression spring 22, then the draw hooks are loosened, the first slide block 3 and the second slide block 4 continue to move downwards under the action of the compression spring 22, and the core-pulling distance for taking out a workpiece is reserved; finally, the hydraulic cylinder 14 drives the push block 15 to pull out the second side hole forming block 16, and the die opening action is completed; at this time, the product is attached to the core 13 and then taken out by a dedicated robot.

In the embodiment, when the number of pouring points of the pouring system is determined, the molding quality of the product under the conditions of different numbers of pouring points is compared by performing cooling and warping analysis on the injection process of the product, and the optimal number of pouring points is obtained.

The shell mold of the embodiment is a two-plate mold, one mold and one cavity, and a cold runner casting system is adopted. Because the wall thickness of the plastic part is smaller, the defects of difficult melt mold filling, easy deformation of the plastic part and the like easily exist. In order to optimize the result, two pouring schemes, namely a two-point glue feeding scheme and a three-point pouring scheme, are designed by adopting different pouring point positions. Analysis by the Moldflow anti-vacuum software showed that the weld lines for the two-point glue were predominantly on both sides of the cylinder wall, with essentially no weld lines at the handle, as shown in FIG. 10. The part is filled with glue at three points, and a joint of the upper edge of the handle and the cylinder wall is provided with a relatively obvious weld mark. Considering that the upper end of the handle will bear most of the load in actual use, the generation of weld marks will reduce the strength of the place. In addition, the warpage analysis by using Moldflow anti-true software can very intuitively simulate and display the warpage and deformation degree thereof which can occur in actual production. As shown in fig. 11, the maximum deformation amount of the two-point glue feeding scheme is smaller than that of the three-point glue feeding scheme. Meanwhile, in the two-point glue feeding scheme, the blue and green areas representing smaller deformation are obviously more than the three-point glue feeding scheme. The factors are comprehensively considered, the two-point glue feeding scheme is superior to the three-point glue feeding scheme, and the mold of the embodiment adopts the two-point glue feeding scheme.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the embodiments described above, but that many variations are possible. Any simple modification and modification of the above embodiments in accordance with the technical spirit of the present invention should be considered as falling within the scope of the present invention.

Claims

1. An injection mold for a cup body shell of a soybean milk machine comprises a cylinder wall and a handle, wherein a through hole between the inner side of the handle and the cylinder wall is defined as a first side hole, a concave surface at the outer side of the handle is defined as a second side hole, and the cylinder wall is in a cylindrical shape with a small upper part and a big lower part; the injection mold is characterized by comprising a fixed mold component and a movable mold component, wherein the movable mold component can move linearly relative to the fixed mold component;

the fixed die assembly comprises a fixed die pressing plate and a fixed die plate, wherein a pouring gate is arranged on the fixed die pressing plate and communicated with a pouring gate runner; a first sliding block and a second sliding block are symmetrically arranged in the fixed die plate, the first sliding block and the second sliding block are respectively arranged in the fixed die plate in a manner of obliquely sliding through dovetail grooves, and the bottoms of the first sliding block and the second sliding block are respectively and fixedly provided with an L-shaped first drag hook; the opposite sides of the first sliding block and the second sliding block are respectively provided with a cavity groove, so that a cavity is formed after the first sliding block and the second sliding block are in opposite contact, one side of the cavity is provided with a handle forming opening with the width equivalent to that of a handle, and the side walls of the handle forming opening of the first sliding block and the second sliding block are respectively provided with a first side hole mold core corresponding to each other;

the movable die assembly sequentially comprises a movable die pressing plate, a movable die plate and a push plate, wherein a die core corresponding to the cavity is arranged on the movable die plate, and a lateral core-pulling mechanism for forming a second side hole is arranged on the push plate; a draw hook groove corresponding to the first draw hook is formed in the push plate, and a second draw hook matched with the first draw hook is arranged in the draw hook groove;

2. The injection mold for the cup body shell of the soybean milk maker according to claim 1, wherein the lateral core pulling mechanism comprises a hydraulic cylinder, a push block and a second side hole forming block, the push block is connected with an output end of the hydraulic cylinder, the push block is fixedly connected with the second side hole forming block, and the second side hole forming block corresponds to the handle forming opening during mold closing.

3. The injection mold of the cup body shell of the soymilk machine as claimed in claim 1, wherein the fixed mold plate is provided with an inclined guide post, the first slide block and the second slide block are respectively provided with an inclined guide groove corresponding to the inclined guide post, and a compression spring is arranged between the inclined guide post and the inclined guide groove.

4. The injection mold for the cup body shell of the soymilk machine as claimed in claim 1, wherein the opposite sides of the first slide block and the second slide block are respectively provided with at least one positioning lug and a positioning groove which correspond to each other.

5. The injection mold for the cup body shell of the soymilk machine according to claim 4, characterized in that the first side holes of the first slide block and the second slide block are respectively provided with a positioning lug and a positioning groove which are corresponding to each other.

6. The injection mold for the cup body shell of the soymilk machine as claimed in claim 1, wherein a plurality of guide posts are arranged on the movable mold component, and the fixed mold component is provided with guide sleeves matched with the guide posts, so that the movable mold component can move linearly along the guide posts relative to the fixed mold component.

7. The injection mold for the cup body shell of the soymilk machine according to claim 1, characterized in that a multi-point pouring mode is adopted after the sprue runner is divided, and pouring points are centrosymmetric.

8. The injection mold for the cup body shell of the soymilk maker according to claim 7, characterized in that the number of the pouring points is two.

9. The injection mold for the cup body shell of the soymilk machine as claimed in claim 1, characterized in that a plurality of cooling water flow channels are arranged in the core.