An injection mold capable of adjusting the length of a pipe fitting

Abstract

The present invention discloses an injection mold capable of adjusting the length of a pipe fitting, comprising a fixed mold plate, a movable mold plate and a core, wherein a first cavity block is arranged on the fixed mold plate, and a second cavity block is arranged on the movable mold plate, wherein the first cavity block and the second cavity block constitute a tubular cavity with an opening, wherein the core is set inside the tubular cavity by pulling out the core from the opening, wherein the outer wall of the core and the inner wall of the first cavity block and the inner wall of the second cavity block constitute a tubular forming cavity, wherein an adjusting sleeve is sleeved on the core, and the inner end of the adjusting sleeve extends into the tubular forming cavity; an axial adjusting fixture is arranged at the opening of the tubular cavity; after the adjusting sleeve slides to the required position on the core, the adjusting sleeve is fixed on the axial adjusting fixture to change the length of the tubular forming cavity. The present invention is easy to adjust, can be directly operated on the machine platform, and can adjust the size accurately, and the formed product does not need to be cut.

Description

Technical Field

[0001] The invention relates to the technical field of molding dies, and in particular to an injection mold capable of adjusting the length of a pipe fitting. Background Art

[0002] There are two main ways to form pipe fittings in the prior art.

[0003] One method is to obtain the pipes through injection molding. The length of the injection mold is fixed and can only produce pipes of a single length. When other lengths need to be injected, the mold needs to be reopened or made into different inserts, resulting in higher manufacturing costs and difficulty in replacement.

[0004] The other method is to obtain it through extrusion molding. The extruded pipe fittings need to be cut after molding. The manufacturing process is relatively complicated, and only single-length pipe fittings can be produced. When other lengths are required, the cutting station needs to be adjusted.

[0005] The Chinese patent application number CN201420366630.0 proposes a mold for producing a length-adjustable hose. When adjusting the length of the injection-molded hose, the upper and lower molds can only be disassembled, and the length needs to be adjusted manually, and the adjustment method is complicated. Summary of the invention

[0006] The object of the present invention is to provide an injection mold with adjustable pipe length, to overcome the above-mentioned defects, and to provide an injection mold structure that is convenient to adjust and easy to inject pipes of different lengths.

[0007] To achieve the above-mentioned purpose, the solution of the present invention is: an injection mold capable of adjusting the length of a pipe fitting, comprising a fixed mold plate, a movable mold plate and a core, wherein a first cavity block is arranged on the fixed mold plate, and a second cavity block is arranged on the movable mold plate, wherein the first cavity block and the second cavity block constitute a tubular cavity with an opening, wherein the core is arranged inside the tubular cavity by drawing the core from the opening, and wherein the outer wall of the core and the inner wall of the first cavity block and the inner wall of the second cavity block constitute a tubular forming cavity,

[0008] An adjusting sleeve is sleeved on the core, and the inner end of the adjusting sleeve extends into the tubular forming cavity; an axial adjusting fixing device is provided at the opening of the tubular cavity; after the adjusting sleeve slides to the required position on the core, the adjusting sleeve is fixed on the axial adjusting fixing device to change the length of the tubular forming cavity.

[0009] Preferably, the axial adjustment and fixing device comprises an adjustment panel and a sleeve fixing plate, the adjustment panel and the sleeve fixing plate are arranged relatively up and down, the adjustment panel is arranged on the sleeve fixing plate by bolts, and the core passes through between the adjustment panel and the sleeve fixing plate;

[0010] A plurality of clamping grooves are sequentially arranged on the adjusting panel along the length direction of the tubular cavity, the clamping grooves are matched with the adjusting sleeve, the sleeve fixing plate is used to fix the adjusting sleeve, and the sleeve fixing plate is provided with a yielding groove.

[0011] Preferably, the first slot on the adjustment panel determines the starting length of the tubular forming cavity of the product.

[0012] Preferably, it further comprises a push plate, the push plate comprising a sleeve portion and a track portion, the push plate is arranged between the fixed mold plate and the movable mold plate, the sleeve portion is sleeved outside the second cavity block, and the track portion extends from the fixed mold plate and the movable mold plate to the outside of the mold;

[0013] A slider plate is slidably mounted on the track portion, and the slider plate is used to install the core. A forming limit block is disposed on the outer side of the slider plate. When the fixed mold plate and the movable mold plate are combined, the forming limit block abuts against the fixed mold plate.

[0014] A cylinder is arranged outside the track portion, and the cylinder is connected to the forming limit block through a connecting rod.

[0015] Preferably, the core includes a guide boss and a mounting convex strip, the core is a cylindrical component, the guide boss is the middle protrusion on one end face of the cylinder, the guide boss contacts the first cavity block and the second cavity block respectively above and below, the mounting convex strip is an annular protrusion strip on the edge of the other end of the cylinder, a stop surface with a planar notch is provided on the annular protrusion strip, and the mounting convex strip cooperates with the slider pressure plate.

[0016] Preferably, an annular convex strip is provided on the outer end of the adjusting sleeve.

[0017] Preferably, a bottom plate is also provided under the movable template, and the movable template is mounted on the bottom plate via mold feet.

[0018] After adopting the above scheme, the beneficial effects of the present invention are:

[0019] 1. Easy to adjust. In this case, the tubular cavity of the mold is adjusted by using an adjusting sleeve in conjunction with an adjusting panel. The adjusting panel is easy to disassemble and assemble, and can be directly operated on the machine, making it easy to adjust.

[0020] 2. Accurate adjustment of size. This case uses adjustment panels of various specifications. A plurality of slots are arranged in sequence along the length direction of the tubular cavity on the adjustment panel. The size can be accurately adjusted by pre-setting the intervals between the slots.

[0021] 3. The molded products do not need to be cut. In this case, the pipe fittings are produced by injection molding. After molding, no additional cutting of the pipe fittings is required, which can greatly reduce the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is a cross-sectional view of the present invention;

[0024] Figure 3 It is a schematic diagram of the working state of the present invention;

[0025] Figure 4 is a cross-sectional view of the working state of the present invention;

[0026] Figure 5 is a cross-sectional view of the working state of the present invention after the adjusting sleeve is adjusted;

[0027] Figure 6 is an exploded cross-sectional view of the present invention;

[0028] Figure 7 yes Figure 4 Detailed view of point a in the middle;

[0029] Figure 8 It is a structural diagram of the core of the present invention;

[0030] Fig. 9 is a structural diagram of the adjustment panel of the present invention;

[0031] Fig.10 is a structural diagram of an adjustment panel in another adjustment range of the present invention;

[0032] Fig.11 It is a structural diagram of the sleeve fixing plate of the present invention;

[0033] Fig.12 is a structural diagram of the adjusting sleeve of the present invention;

[0034] Fig.13 It is an exploded view of the present invention.

[0035] Explanation of reference numerals: fixed die plate (1), movable die plate (2), core (3), first die cavity block (11), second die cavity block (21), tubular forming die cavity (10), axial adjustment fixing device (5), adjustment panel (51), slot (511), sleeve fixing plate (52), clearance slot (521), adjustment sleeve (4), annular convex strip (41), push plate (6), sleeve joint portion (61), track portion (62), slide plate (63), forming limit block (64), cylinder (65), connecting rod (66), guide boss (31), mounting convex strip (32), anti-rotation surface (33), bottom plate (7), die foot (71). DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] like Figure 1-13As shown, the present invention provides an injection mold capable of adjusting the length of a pipe fitting, comprising a fixed mold plate 1, a movable mold plate 2 and a core 3, wherein a first cavity block 11 is arranged on the fixed mold plate 1, and a second cavity block 21 is arranged on the movable mold plate 2, wherein the first cavity block 11 and the second cavity block 21 constitute a tubular cavity with an opening, wherein the core 3 is arranged inside the tubular cavity by drawing a core from the opening, and an outer wall of the core 3 and an inner wall of the first cavity block 11 and an inner wall of the second cavity block 21 constitute a tubular forming cavity,

[0038] The core 3 is sleeved with an adjusting sleeve 4, the inner end of which extends into the tubular forming cavity; an axial adjusting fixture 5 is provided at the opening of the tubular cavity; after the adjusting sleeve 4 slides to a desired position on the core 3, the adjusting sleeve 4 is fixed to the axial adjusting fixture 5 to change the length of the tubular forming cavity. An annular convex strip 41 is provided at the outer end of the adjusting sleeve 4.

[0039] The axial adjustment and fixing device 5 comprises an adjustment panel 51 and a sleeve fixing plate 52, wherein the adjustment panel 51 and the sleeve fixing plate 52 are arranged opposite to each other up and down, the adjustment panel 51 is arranged on the sleeve fixing plate 52 by bolts, and the core 3 passes through between the adjustment panel 51 and the sleeve fixing plate 52;

[0040] The adjusting panel 51 is provided with a plurality of slots 511 in sequence along the length direction of the tubular cavity, and the slots 511 cooperate with the adjusting sleeve 4, and more specifically, the slots 511 engage with the annular convex strip 41. The sleeve fixing plate 52 is used to fix the adjusting sleeve 4, and the sleeve fixing plate 52 is provided with a clearance groove 521, and the clearance groove 521 is used for the annular convex strip 41 to make way, and the clearance groove 521 is used to allow the adjusting sleeve 4 to slide left and right in the sleeve fixing plate 52 when the adjusting panel 51 is replaced.

[0041] In this case, the adjustment panel 51 is provided with four tube grooves, and six slots 511 are provided on the wall of each tube groove. The slots in the tube groove are spaced apart by a certain distance, and the distance constitutes the adjustment value of the adjustment sleeve 4. In actual production, multiple adjustment panels 51 can be provided, and each adjustment panel 51 has different adjustment accuracy and adjustment distance. The first slot 511 on the adjustment panel 51 determines the starting length of the tubular forming cavity of the product. Multiple adjustment panels 51 with different first slots 511 positions are provided, and multiple adjustment panels 51 are combined with each other to meet the adjustment accuracy within any range. In this case, it can be obtained from the attached Figure 9-10 For detailed understanding, c and d in the figure are for adjusting the position of the first slot 511 on the panel 51, more specifically, the distance between the first slot 511 and the outer side surface. By changing this distance, the purpose of adjusting different accuracies can be achieved, and the accuracy of the adjustment can be guaranteed.

[0042] When the adjustment panel 51 is interchanged, it is only necessary to remove the bolts on the adjustment panel 51, install the corresponding adjustment panel 51, and then screw on the bolts to continue production. This method of adjusting production has a short replacement time, is easy to adjust, and does not require a lower die.

[0043] A push plate 6 is arranged between the fixed mold plate 1 and the movable mold plate 2, and the push plate 6 includes a sleeve portion 61 and a track portion 62. The sleeve portion 61 is sleeved outside the second cavity block 21, and the track portion 62 extends from the fixed mold plate 1 and the movable mold plate 2 to the outside of the mold; the push plate 6 is for facilitating the installation of the core 3, and the core 3 can be quickly pulled out from between the fixed mold plate 1 and the movable mold plate 2 when not being processed.

[0044] A slider plate 63 is slidably disposed on the track portion 62, and the slider plate 63 is used to install the core 3. A forming limit block 64 is disposed on the outer side of the slider plate 63. When the fixed mold plate 1 and the movable mold plate 2 are combined, the forming limit block 64 abuts against the fixed mold plate 1.

[0045] The outer side of the track portion 62 is provided with a cylinder 65, and the cylinder 65 is connected to the forming limit block 64 through a connecting rod 66. The cylinder 65 is for moving the forming limit block 64 more quickly.

[0046] The core 3 includes a guide boss 31 and a mounting convex strip 32. The core 3 is a cylindrical component. The guide boss 31 is a middle convexity on one end face of the cylinder. The guide boss 31 contacts the first cavity block 11 and the second cavity block 21 respectively. The mounting convex strip 32 is an annular convex strip on the edge of the other end of the cylinder. A rotation-stopping surface 33 with a plane notch is provided on the annular convex strip. The rotation-stopping surface 33 is to prevent the core 3 from rotating during the injection molding operation. The mounting convex strip 32 cooperates with the slider plate 63.

[0047] A bottom plate 7 is also provided under the movable plate 2, and the movable plate 2 is mounted on the bottom plate 7 through a die foot 71. The bottom plate 7 is for further facilitating the installation of the movable plate 2.

[0048] The above description is only a preferred embodiment of the present invention and is not a limitation on the design of this case. Any equivalent changes made based on the design key of this case shall fall within the protection scope of this case.

Claims

1. An injection mold capable of adjusting the length of a pipe, comprising a fixed mold plate (1), a movable mold plate (2) and a core (3), wherein a first cavity block (11) is arranged on the fixed mold plate (1), and a second cavity block (21) is arranged on the movable mold plate (2), wherein the first cavity block (11) and the second cavity block (21) form a tubular cavity with an opening, wherein the core (3) is arranged inside the tubular cavity by pulling out the core from the opening, and wherein the outer wall of the core (3) and the inner wall of the first cavity block (11) and the inner wall of the second cavity block (21) form a tubular forming cavity, characterized in that: An adjusting sleeve (4) is sleeved on the core (3), and the inner end of the adjusting sleeve (4) extends into the tubular forming cavity; an axial adjusting fixing device (5) is provided at the opening of the tubular cavity; after the adjusting sleeve (4) slides on the core (3) to a desired position, the adjusting sleeve (4) is fixed to the axial adjusting fixing device (5) to change the length of the tubular forming cavity; the axial adjusting fixing device (5) comprises an adjusting panel (51) and a sleeve fixing plate (52), and the adjusting panel (51) and The sleeve fixing plates (52) are arranged opposite to each other up and down, the adjusting panel (51) is arranged on the sleeve fixing plate (52) by bolts, and the core (3) passes through between the adjusting panel (51) and the sleeve fixing plate (52); a plurality of clamping grooves (511) are arranged in sequence on the adjusting panel (51) along the length direction of the tubular cavity, and the clamping grooves (511) cooperate with the adjusting sleeve (4); the sleeve fixing plate (52) is used to fix the adjusting sleeve (4), and the sleeve fixing plate (52) is provided with a clearance groove (521).

2. An injection mold with adjustable pipe length as claimed in claim 1, characterized in that: The first slot (511) on the adjusting panel (51) determines the starting length of the tubular forming cavity of the product.

3. An injection mold with adjustable pipe length as claimed in claim 1, characterized in that: It also includes a push plate (6), the push plate (6) including a sleeve portion (61) and a track portion (62), the push plate (6) is arranged between the fixed mold plate (1) and the movable mold plate (2), the sleeve portion (61) is sleeved outside the second cavity block (21), and the track portion (62) extends from the fixed mold plate (1) and the movable mold plate (2) to the outside of the mold; A slider plate (63) is slidably mounted on the track portion (62), and the slider plate (63) is used to mount the core (3). A forming limit block (64) is disposed on the outer side of the slider plate (63). When the fixed mold plate (1) and the movable mold plate (2) are combined, the forming limit block (64) abuts against the fixed mold plate (1); A cylinder (65) is arranged outside the track portion (62), and the cylinder (65) is connected to the forming limit block (64) via a connecting rod (66).

4. An injection mold capable of adjusting the length of a pipe as claimed in claim 3, characterized in that: The core (3) comprises a guide boss (31) and a mounting convex strip (32). The core (3) is a cylindrical component. The guide boss (31) is a middle convex protrusion on one end surface of the cylinder. The guide boss (31) contacts the first cavity block (11) and the second cavity block (21) above and below respectively. The mounting convex strip (32) is an annular convex strip on the edge of the other end of the cylinder. A rotation-stopping surface (33) with a plane notch is provided on the annular convex strip. The mounting convex strip (32) cooperates with the slider pressure plate (63).

5. The injection mold with adjustable pipe length as claimed in claim 1, characterized in that: An annular convex strip (41) is provided at the outer end of the adjusting sleeve (4).

6. An injection mold with adjustable pipe length as claimed in claim 1, characterized in that: A bottom plate (7) is also provided under the movable die plate (2), and the movable die plate (2) is mounted on the bottom plate (7) via die feet (71).

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