An injection mold for a water bucket

Abstract

A water bucket injection mold, comprising a front mold, a rear mold, a gating system, and an ejection mechanism. The front mold includes a panel, a front template, a front module, an inlay panel, and a first insert. The rear mold includes a rear template, square iron, a rear module, and a second insert. A chute is provided on the parting surface where the first insert and the second insert are closed. A first slider is provided in the chute. It also includes an oil cylinder for driving the movement of the first slider and a cylinder that slides with the first slider. After the front mold and the rear mold are closed, a first molding cavity for the injection molding of the bucket body and a second molding cavity for the injection molding of the handle are formed. The injection mold realizes the synchronous injection molding of the bucket body and the handle. After the injection is completed, the assembly of the bucket body and the handle is realized through the cylinder, and the product can be taken out by demolding. The injection mold is used for producing water buckets with special structures.

Description

Technical Field

[0001] The present invention relates to an injection mold for a water bucket. Background Art

[0002] Plastic water buckets are commonly used in daily life. Conventional plastic water buckets include a bucket body and a handle. The handle is rotatably connected to the rim of the bucket body. Generally, the above-mentioned bucket body and handle are produced by injection molding using injection molds. Two sets of injection molds are required for the handle and the bucket body to achieve mass production.

[0003] Therefore, people began to study the injection molding of water buckets within a set of injection molds. For example, in the invention patent application with the application number 201910059538.2, an injection mold for a water bucket is disclosed. In this solution, it can be directly seen from the Figure 8 , Figure 9 of the specification drawings that the semi-perimeter length of the handle 2 is longer than that of the rim of the bucket body 1. For water buckets with this structure, the bucket body and the handle can be respectively injection molded within an injection mold, and then the in-mold assembly of the two can be achieved through a press-fitting method;

[0004] However, for water buckets with other structures, such as the water buckets shown in the specification drawings of this solution ( Figure 10 and Figure 11 ), the semi-perimeter lengths of the handle and the rim of the bucket body are equal and matching. Currently, it is still impossible to achieve in-mold synchronous injection and assembly of this water bucket within an injection mold. Summary of the Invention

[0005] Aiming at the deficiencies in the above problems, the present invention provides an injection mold for a water bucket.

[0006] To achieve the above object, the present invention provides an injection mold for a water bucket, including:

[0007] A front mold, the front mold includes a panel, a front template, and a front module connected in sequence from right to left. An insert plate is provided on the left side of the front template. The front module and the insert plate together form a barrel-shaped receiving cavity. A first notch is opened on the left end face of the front module, and a first insert is provided in the first notch. A first forming groove is machined on the lower part of the left side face of the first insert;

[0008] A rear mold, the rear mold includes a rear template, a square iron, and a rear module connected in sequence from left to right. A protruding part extending into the receiving cavity is provided in the middle of the rear module. A second notch is opened on the right end face of the rear module, and a second insert is provided in the second notch. A second forming groove is machined on the lower part of the right side face of the second insert;

[0009] After the front mold and the rear mold are clamped, concave chutes are machined on both the inner and outer sides of the parting surface between the first insert and the second insert. A first slider that slides up and down is disposed in the chute. A through hole is formed in the first slider, and a movable insert is disposed in the through hole. A forming groove I is machined on the first slider, and a forming groove II is machined on the insert;

[0010] A guiding block is further disposed in the rear module. The guiding block guides the insert through an inclined track, so that the insert can enter or leave the position of the through hole during the movement along with the first slider. A sliding wedge block is further disposed on the first slider. A spring for resetting is disposed between the wedge block and the first slider, and a columnar protrusion is disposed at the end of the wedge block. A first wedge is disposed on the left end face of the first insert corresponding to the wedge block;

[0011] After the front mold and the rear mold are clamped, the columnar protrusion, the protruding portion, the first insert, and the second insert form a first forming cavity for injection molding of the barrel body in the accommodating cavity. The first forming groove, the second forming groove, the forming groove I, and the forming groove II together form a second forming cavity for injection molding of the handle;

[0012] A cylinder, the cylinder is fixedly connected to the side surface of the first slider, and a punching rod is disposed at the shaft end of the cylinder. The punching rod corresponds to the position of the forming groove II;

[0013] An oil cylinder, the oil cylinder is used to drive the first slider to slide in the chute;

[0014] The injection mold has a clever structural design and is specifically used for injection molding of a water bucket with a special shape. Inside the mold, after the barrel body and the handle are respectively injection molded, through the sliding of the first slider, the handle is moved to the corresponding position of the barrel body, and the in-mold assembly is completed by the stamping of the cylinder.

[0015] Preferably, the water bucket injection mold further includes a pouring system. The pouring system includes a hot runner plate, a first hot nozzle, a second hot nozzle, and a third hot nozzle. The first hot nozzle is connected to the injection machine nozzle. The hot runner plate is located in the front template. The first hot nozzle is communicated with the second hot nozzle and the third hot nozzle through the hot runner plate. Among them, the second hot nozzle is connected to the first forming cavity, and the third hot nozzle is connected to the second forming cavity;

[0016] In the above technical solution, the molten raw material first enters the first hot nozzle from the injection molding machine nozzle. The first hot nozzle transports the raw material from the hot runner plate to the second hot nozzle and the third hot nozzle, and the raw material is respectively transported into the first molding cavity and the second molding cavity through the second hot nozzle and the third hot nozzle, realizing synchronous injection molding of the two cavities. Secondly, the setting of the hot runner can improve the fluidity of the raw material, eliminate the gate in the injection molding process, and achieve the effect of saving the raw material. At the same time, since the injection product is a thin-walled part, high-precision and high-quality products can be easily produced through the hot runner.

[0017] Preferably, the upper end of the first slider is beveled, and a second wedge is further provided on the left end surface of the first insert. The second wedge is matched with the beveled position of the first slider.

[0018] In the above technical solution, through the action of the second wedge and the first slider, the position of the first slider is further limited, ensuring the accuracy of mold closing.

[0019] Preferably, the cylinder is fixedly connected to the first slider through a connecting member, and a contact switch is provided on each of the upper and lower sides of the connecting member on the rear module.

[0020] In the above technical solution, through the action of the connecting member and the contact switch, a signal feedback of the sliding position of the slider is obtained, and an electrical signal for controlling the cylinder to execute an action is simultaneously issued.

[0021] Preferably, the water bucket injection mold further includes an ejection mechanism. The ejection mechanism includes a top plate movably disposed inside the square iron. The top plate is fixedly connected to the second insert through an ejection rod. An installation frame is fixed to the lower part of the top plate, and the oil cylinder is fixedly installed on the installation frame.

[0022] In the above technical solution, the oil cylinder is indirectly fixedly connected to the top plate through the installation frame, so that the oil cylinder moves synchronously with the top plate, meeting the requirements of the actual design.

[0023] Preferably, a second slider is provided at the shaft end of the oil cylinder. The second slider and the installation frame are in a relative sliding structure. The second slider is fixedly connected to the first slider through a connecting rod, and the connecting rod passes through the second insert.

[0024] In the above technical solution, the hydraulic force of the oil cylinder is large, and the second slider and the installation frame are in a relative sliding structure, facilitating the sliding of the first slider in the chute.

[0025] Preferably, a locking rod is further provided on the front module. After the front mold and the rear mold are closed, the locking rod abuts against the upper surface of the second slider.

[0026] In the above technical solution, the locking rod plays a safety role. When the oil cylinder does not fully pull the first slider to the low position, the second slider restricts the movement of the locking rod to ensure that the front mold and the rear mold cannot be closed.

[0027] The beneficial effects of the present invention compared with the prior art are as follows: The injection mold has a clever structural design and is dedicated to the injection molding of water buckets with special shapes. Inside the mold, after the bucket body and the handle are respectively injection molded, through the sliding of the first slider, the handle moves to the corresponding position of the bucket body, and the in-mold assembly is completed by the stamping of the air cylinder; The injection mold realizes the synchronous injection molding of the bucket body and the handle. After the injection molding is completed, the assembly of the bucket body and the handle is realized through the air cylinder, and the product can be taken out after demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view of the water bucket injection mold related to the present invention;

[0029] Figure 2 is the front view of the water bucket injection mold related to the present invention;

[0030] Figure 3 is the top view of the water bucket injection mold related to the present invention;

[0031] Figure 4 is Figure 2 the cross-sectional view at the A-A position in

[0032] Figure 5 is Figure 3 the cross-sectional view at the B-B position in

[0033] Figure 6 is the perspective view of the first insert;

[0034] Figure 7 is the perspective view of the rear mold of the water bucket injection mold related to the present invention;

[0035] Figure 8 is the enlarged view of the first slider;

[0036] Figure 9 is the perspective view of the water bucket injection mold related to the present invention (hiding the square iron and the rear module);

[0037] Figure 10 is the perspective view of the water bucket related to this solution;

[0038] Figure 11 is the top view of the water bucket related to this solution.

[0039] In the figure: 10, front mold; 101, panel; 102, front template; 103, front module; 104, panel; 11, first insert; 111, first forming groove; 12, first angled wedge; 13, second angled wedge; 20, rear mold; 201, rear template; 202, spacer block; 203, rear module; 2031, raised portion; 21, second insert; 211, second forming groove; 30, first slider; 301, forming groove I; 31, insert block; 311, forming groove II; 32, guide block; 33, angled wedge block; 331, columnar projection; 40, air cylinder; 41, connecting member; 42, proximity switch; 43, punching rod; 50, oil cylinder; 51, second slider; 52, connecting rod; 60, first hot nozzle; 61, hot runner plate; 62, second hot nozzle; 66, third hot nozzle; 70, top plate; 71, ejector rod; 72, mounting bracket; 80, locking rod; 1, barrel body; 2, handle. Detailed implementation manner

[0040] As Figures 1 to 9As shown in the figure, an injection mold for a water bucket according to an embodiment of the present invention includes a front mold 10 and a rear mold 20 that interact with each other. The front mold 10 includes a panel 101, a front template 102, and a front module 103 that are sequentially connected from right to left. A fitting plate 104 is provided on the left side of the front template 102. The front module 103 and the fitting plate 104 together form a barrel-shaped receiving cavity. A first notch is formed on the left end face of the front module 103, and a first insert 11 is provided in the first notch. A first forming groove 111 is machined on the lower part of the left side face of the first insert 11; the rear mold 20 includes a rear template 201, a square iron 202, and a rear module 203 that are sequentially connected from left to right. A convex portion 2031 that extends into the receiving cavity is provided in the middle of the rear module 203. A second notch is formed on the right end face of the rear module 203, and a second insert 21 is provided in the second notch. A second forming groove 211 is machined on the lower part of the right side face of the second insert 21; after the front mold 10 and the rear mold 20 are closed, concave chutes are machined on both the inner and outer sides of the parting surface of the first insert 11 and the second insert 21. A first slider 30 that slides up and down is provided in the chute. A through hole is formed in the first slider 30, and a movable insert 31 is provided in the through hole. A forming groove I 301 is machined on the first slider 30, and a forming groove II 311 is machined on the insert 31; a guiding block 32 is further provided in the rear module 203. The guiding block 32 guides the insert 31 through an inclined track, so that the insert 31 can enter or leave the position of the through hole during the movement along with the first slider 30; a sliding wedge block 33 is further provided on the first slider 30. A spring for resetting is provided between the wedge block 33 and the first slider 30, and a column convex 331 is provided at the end of the wedge block 33. A first wedge 12 is provided on the left end face of the first insert 11 corresponding to the wedge block 33; after the front mold 10 and the rear mold 20 are closed, the column convex 331, the convex portion 2031, the first insert 11, and the second insert 21 form a first forming cavity for injection molding of the barrel body 1 in the receiving cavity. The first forming groove 111, the second forming groove 211, the forming groove I 301, and the forming groove II 311 together form a second forming cavity for injection molding of the handle 2; a cylinder 40 is fixedly connected to the side face of the first slider 30. A punch rod 43 is provided at the shaft end of the cylinder 40, and the punch rod 43 corresponds to the position of the forming groove II 311; an oil cylinder 50 is used to drive the first slider 30 to slide in the chute;Among them, the water bucket injection mold further includes a pouring system, which includes a hot runner plate 61, a first hot nozzle 60, a second hot nozzle 62 and a third hot nozzle 63. The first hot nozzle 60 is connected to the injection machine nozzle. The hot runner plate 61 is located inside the front template 102. The first hot nozzle 60 is communicated with the second hot nozzle 62 and the third hot nozzle 63 through the hot runner plate 61. Among them, the second hot nozzle 62 is connected to the first molding cavity, and the third hot nozzle 63 is connected to the second molding cavity. The molten raw material first enters the first hot nozzle from the injection machine nozzle. The first hot nozzle transports the raw material to the second hot nozzle and the third hot nozzle through the hot runner plate. The raw material is respectively transported into the first molding cavity and the second molding cavity through the second hot nozzle and the third hot nozzle, realizing the synchronous injection molding of the two cavities. Secondly, the setting of the hot runner can improve the fluidity of the raw material, eliminate the gate in the injection process, and achieve the effect of saving the raw material. At the same time, since the injection product is a thin-walled part, high-precision and high-quality products can be easily produced through the hot runner. The upper end of the first slider 30 is beveled. A second wedge 13 is further provided on the left end face of the first insert 11. The second wedge 13 matches the beveled position of the first slider 30. Through the action of the second wedge and the first slider, the position of the first slider is further limited to ensure the accuracy of mold closing. The cylinder 40 is fixedly connected to the first slider 30 through a connecting piece 41. A contact switch 42 is provided on each of the upper and lower sides of the connecting piece 41 on the rear module 203. Through the action of the connecting piece and the contact switch, the signal feedback of the sliding position of the slider is obtained, and at the same time, an electrical signal for controlling the cylinder to execute an action is sent out. The water bucket injection mold further includes an ejection mechanism, which includes a top plate 70 movably placed inside the square iron 202. The top plate 70 is fixedly connected to the second insert 21 through an ejection rod 71. An installation frame 72 is fixed to the lower part of the top plate 70. The oil cylinder 50 is fixedly installed on the installation frame 72. The oil cylinder is indirectly fixedly connected to the top plate through the installation frame, so that the oil cylinder moves synchronously with the top plate to meet the actual design requirements. A second slider 51 is provided at the shaft end of the oil cylinder 50. The second slider 51 and the installation frame 72 are in a relative sliding structure. The second slider 51 is fixedly connected to the first slider 30 through a connecting rod 52. The connecting rod 52 passes through the second insert 21. The hydraulic force of the oil cylinder is large, and the second slider and the installation frame are in a relative sliding structure, which is convenient for the first slider to slide in the chute. A locking rod 80 is further provided on the front module 103. After the front mold 10 and the rear mold 20 are closed, the locking rod 80 is close to the upper surface of the second slider 51. The locking rod plays a safety role. When the oil cylinder does not completely pull the first slider to the low position, the second slider restricts the movement of the locking rod to ensure that the front mold and the rear mold cannot be closed.;

[0041] The structural design of this injection mold is ingenious and is specifically used for the injection molding of water buckets with special shapes. Inside the mold, after the barrel body and the handle are respectively injection molded, through the sliding of the first slider, the handle is moved to the corresponding position of the barrel body, and the in-mold assembly is completed by the stamping of the cylinder; this injection mold realizes the synchronous injection molding of the barrel body and the handle. After the injection is completed, the assembly of the barrel body and the handle is realized through the cylinder, and the product can be taken out after demolding.

[0042] During specific use, for the convenience of understanding the present invention, it is described in conjunction with the accompanying drawings;

[0043] After the front mold 10 and the rear mold 20 are closed, the first slider 30 is located at the low position of the chute. The column protrusion 331, the protrusion part 2031, the first insert 11, and the second insert 21 form a first molding cavity for the injection molding of the barrel body 1 in the accommodation cavity. The first molding groove 111, the second molding groove 211, the molding groove I 301, and the molding groove II 311 jointly form a second molding cavity for the injection molding of the handle 2. The molten raw material first enters the first hot nozzle from the injection machine nozzle. The first hot nozzle transports the raw material to the second hot nozzle and the third hot nozzle through the hot runner plate, and the raw material is respectively transported into the first molding cavity and the second molding cavity through the second hot nozzle and the third hot nozzle to realize the synchronous injection molding of the two cavities;

[0044] The demolding process of the injection mold is as follows:

[0045] The front mold moves relative to the rear mold, so that the outer wall of the barrel body 1 is first separated from the first insert 11, the front mold block 103, and the panel 104. The first wedge 12 moves along with the first insert 11 (the second wedge 13 also moves along with the first insert 11 at the same time). See Figure 8 , the wedge block 33 is reset under the action of the spring, and the column protrusion 331 forms a card hole on the barrel edge of the barrel body 1 after withdrawing. See Figure 7 , the oil cylinder acts to drive the first slider 30 to slide upwards to the high position. The insert block 31 moves upwards along with the first slider 30. At the same time, while the insert block 31 moves along with the first slider 30, it withdraws from the through hole of the first slider 30 to make space for the stamping of the handle;

[0046] The first slider 30 reaches the high position of the chute. At this time, the punch rod 43 is aligned with the card hole on the barrel edge of the barrel body 1, the contact switch 42 contacts the connecting member 41, the cylinder 40 receives the electrical signal, and the punch rod 43 at the shaft end of the cylinder 40 punches the head of the handle 2 into the card hole on the barrel edge of the barrel body 1 to realize the in-mold assembly;

[0047] After that, the injection molding machine ejects. The top plate 70 ejects the second insert 21 through the ejector rod 71, causing the second insert 21 to leave the second notch of the rear module 203. The second insert 21 moves synchronously with the assembled water bucket, causing the inner wall of the barrel of the water bucket to separate from the convex portion 2031, achieving demolding. During the ejection process of the top plate 70, the top plate 70 indirectly drives the oil cylinder 50 to move simultaneously through the mounting bracket 72. The air cylinder 40 is fixedly connected to the first slider 30, and the air cylinder 40 also moves synchronously with the top plate 70.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water bucket injection mold, characterized in that: It includes a front mold (10), the front mold (10) includes a panel (101), a front template (102), and a front module (103) connected in sequence from right to left. An insert panel (104) is provided on the left side of the front template (102). The front module (103) and the insert panel (104) together form a bucket-shaped receiving cavity. A first notch is formed on the left end face of the front module (103), and a first insert (11) is provided in the first notch. A first forming groove (111) is machined on the lower part of the left side face of the first insert (11); a rear mold (20), the rear mold (20) includes a rear template (201), a square iron (202), and a rear module (203) connected in sequence from left to right. A convex part (2031) extending into the receiving cavity is provided in the middle of the rear module (203). A second notch is formed on the right end face of the rear module (203), and a second insert (21) is provided in the second notch. A second forming groove (211) is machined on the lower part of the right side face of the second insert (21); After the front mold (10) and the rear mold (20) are closed, concave sliding grooves are machined on both the inner and outer sides of the parting surface of the first insert (11) and the second insert (21). A first slider (30) that slides up and down is arranged in the sliding groove. A through hole is formed on the first slider (30), and a movable insert block (31) is arranged in the through hole. A forming groove I (301) is machined on the first slider (30), and a forming groove II (311) is machined on the insert block (31); A guiding block (32) is further arranged in the rear module (203). The guiding block (32) guides the insert block (31) through an inclined track, so that the insert block (31) can enter or leave the position of the through hole during the movement along with the first slider (30); A sliding wedge block (33) is further arranged on the first slider (30). A spring for resetting is arranged between the wedge block (33) and the first slider (30), and a columnar protrusion (331) is arranged at the end of the wedge block (33). A first wedge (12) is arranged on the left end face of the first insert (11) corresponding to the wedge block (33); After the front mold (10) and the rear mold (20) are closed, the columnar protrusion (331), the convex part (2031), the first insert (11), and the second insert (21) form a first forming cavity for injection molding of the bucket body (1) in the receiving cavity. The first forming groove (111), the second forming groove (211), the forming groove I (301), and the forming groove II (311) together form a second forming cavity for injection molding of the handle (2); a cylinder (40), the cylinder (40) is fixedly connected to the side face of the first slider (30), and a punching rod (43) is arranged at the shaft end of the cylinder (40). The punching rod (43) corresponds to the position of the forming groove II (311); An oil cylinder (50) is used to drive the first slider (30) to slide in the chute.

2. A water bucket injection mold according to claim 1, characterized in that: The water bucket injection mold further includes an injection system, which includes a hot runner plate (61), a first hot nozzle (60), a second hot nozzle (62) and a third hot nozzle (63). The first hot nozzle (60) is connected to the injection machine nozzle. The hot runner plate (61) is located in the front template (102). The first hot nozzle (60) is communicated with the second hot nozzle (62) and the third hot nozzle (63) through the hot runner plate (61). Among them, the second hot nozzle (62) is connected to the first molding cavity, and the third hot nozzle (63) is connected to the second molding cavity.

3. A water bucket injection mold according to claim 1, characterized in that: The upper end of the first slider (30) is beveled, and a second wedge (13) is further provided on the left end surface of the first insert (11). The second wedge (13) is matched with the beveled position of the first slider (30).

4. A water bucket injection mold according to claim 1, characterized in that: The air cylinder (40) is fixedly connected to the first slider (30) through a connecting piece (41). The rear module (203) is provided with a contact switch (42) on each of the upper and lower sides of the connecting piece (41).

5. A water bucket injection mold according to claim 1, characterized in that: The water bucket injection mold further includes an ejection mechanism, which includes a top plate (70) movably placed in the square iron (202). The top plate (70) is fixedly connected to the second insert (21) through an ejection rod (71). An installation frame (72) is fixed to the lower part of the top plate (70). The oil cylinder (50) is fixedly installed on the installation frame (72).

6. A water bucket injection mold according to claim 5, characterized in that: A second slider (51) is provided at the shaft end of the oil cylinder (50). The second slider (51) and the installation frame (72) are in a relative sliding structure. The second slider (51) is fixedly connected to the first slider (30) through a connecting rod (52). The connecting rod (52) passes through the second insert (21).

7. A water bucket injection mold according to claim 6, characterized in that: A locking rod (80) is further provided on the front module (103). After the front mold (10) and the rear mold (20) are closed, the locking rod (80) is in close contact with the upper surface of the second slider (51).

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