Injection molds for the production of inspection wells

Abstract

The present invention discloses an injection mold for producing inspection wells, and the key points of the technical solution are that the injection mold includes two side modules that can be linearly pulled out laterally, and the side module structures are symmetrical with each other. The side modules are provided with a first mold cavity for injection molding the well body, a second mold cavity for molding the main receiving pipe, and a third mold cavity for molding the branch pipe. The second mold cavity and the third mold cavity are both semi-cylindrical, and the axes of the second mold cavity and the third mold cavity are perpendicular to each other. One end of the second mold cavity and the third mold cavity are connected to the first mold cavity and the ends of the two are connected. A notch for connection is provided at the connecting portion of the second mold cavity and the third mold cavity. The advantages of the present invention are: 1. The overall structure of the mold is small and the cost is low; 2. Through the design of the mold cavity, the structure of the injection molded product is stable and the material cost is low.

Description

Technical Field

[0001] The invention relates to the field of molds, and in particular to an injection mold for producing inspection wells. Background Art

[0002] Inspection wells are ancillary structures on the pipeline system. Their main function is to conduct regular inspection and clearing of the pipeline system, and also to divert water flow. Inspection wells are usually set up at the intersections, turns, changes in pipeline size or slope, waterfalls, and on straight pipelines at a certain distance. At present, in order to improve production efficiency and reduce production costs, most inspection wells are made of plastic.

[0003] Today's inspection wells usually include a well body, with a main pipe on the top and branch pipes on the sides. For example, the existing patent with announcement number CN203960992U discloses an inspection well seat, including a well seat, a wellbore socket is provided at the upper end of the well seat, at least one drainage pipe socket is provided on the side wall of the well seat, and annular reinforcement ribs are provided on the outer walls of the wellbore socket and the drainage pipe socket. There is a 360-degree pedestal between the wellbore socket and the well seat, and a 360-degree pedestal is provided in the drainage pipe socket. The 360-degree pedestal is an annular arc structure. Combined with the drawings in the specification, it can be clearly seen that there is a gap between the drainage pipe socket and the wellbore socket.

[0004] For the above-mentioned inspection well, since there is a gap between the socket of the drainage pipe and the socket of the wellbore, the positions of the socket of the drainage pipe and the socket of the wellbore are both connected force-bearing parts, and the directions of the structural forces of the two are perpendicular. Therefore, the alternating parts between the two are very prone to fracture, resulting in low load and limited service life of the product. Therefore, it is necessary to improve the inspection well structure. Once the inspection well structure is modified, in order to smoothly inject and demold the inspection well, the matching mold needs to be modified as a whole. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an injection mold for producing inspection wells, and the technical problem to be solved is: how to produce inspection wells that meet load requirements at low cost and high efficiency.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions: an injection mold for producing inspection wells, comprising two side modules that can be pulled out laterally and linearly, the side module structures are symmetrical with each other, and the side modules are provided with a first mold cavity for injection molding a well body, a second mold cavity for molding a main receiving pipe, and a third mold cavity for molding a branch pipe. The second mold cavity and the third mold cavity are both semi-cylindrical, and the axes of the second mold cavity and the third mold cavity are perpendicular to each other. One end of the second mold cavity and the third mold cavity are connected to the first mold cavity and the ends of the two are connected, and a notch for communication is provided at the connecting portion of the second mold cavity and the third mold cavity.

[0007] Through the above technical scheme, in the design of the mold, two side modules for side pull-out are used for molding, combined with the semi-cylindrical second cavity and the third cavity, so that when the two side modules are molded together, the inspection well can be completely injected into the cavity at one time. The mold structure is small, the manufacturing cost is low, and when the mold is opened, it is very quick and convenient, and it can be pulled out in a straight line, and the stability is strong. In the design of the interior of the cavity, the second cavity is connected to one end of the first cavity, and the connecting position is connected through a notch, so that the ends of the main pipe and the branch pipe of the injection-molded inspection well are an integrated structure, so that the vertical pressure generated on the main pipe can be evenly dispersed to the branch pipe and the well body through the integrated structure, ensuring that the injection-molded inspection well has a high load-bearing capacity, and the overall structure of the large-diameter inspection well can be made smaller, reducing the cost of the mold and the product.

[0008] The present invention is further configured as follows: a top module and a bottom module are respectively provided on the top and bottom of the two side modules, the top module can approach or move away from the bottom module in a straight line, the straight movement direction of the top module is consistent with the straight movement direction of the side module, the first mold cavity and the second mold cavity are coaxially arranged, the top module is provided with a first core block that can be inserted into the first mold cavity and the second mold cavity, the bottom module is provided with a second core block that can be inserted into the first mold cavity, the first core block, the second core block, and the gap between the first mold cavity and the second mold cavity jointly form the space between the well body and the main bearing pipe.

[0009] Through the above technical solution, the bottom module and the top module can be pulled out in the vertical direction. Combined with the core structure above, when demolding, the top module can be separated from the side withdrawal block almost at the same time, and there will be no mold collision between them.

[0010] The present invention is further configured as follows: the injection mold also includes a side withdrawal block that can be linearly pulled out laterally, the linear movement of the side withdrawal block is perpendicular to the side module block, and the side withdrawal block is provided with a third core block that can be inserted into the third mold cavity, and the gap between the third mold cavity and the third core block forms a gap for forming a branch pipe.

[0011] Through the above technical solution, the movement trajectory of the side drawer block and the movement trajectory of the side module are perpendicular to each other, and they will not interfere with each other when opening the mold. In this way, the mold opening speed is faster and the mold production cost is lower.

[0012] The present invention is further configured as follows: the number of the side drawer blocks is two, the number of the third mold cavities on the side drawer block is also two, an insert is provided on the side module, the insert is detachably connected to the side module, and the insert is located at the connection point of one of the third mold cavities, the first mold cavity and the second mold cavity. In this way, if this mold is used for production.

[0013] Through the above technical scheme, the number of the third cavity and the side draw block is two, so that the inspection well directly produced by injection molding during injection molding has a double-branch pipe structure; the connection point between the third cavity, the first cavity and the second cavity is set as an insert structure. If it is necessary to use this mold to produce a single-branch pipe inspection well, it is only necessary to replace the insert with a thicker insert, which can directly interfere with the third core block to seal one of the third cavities.

[0014] The present invention is further configured as follows: an embedding groove is provided on the top module, and when the side modules are closed, the side modules can be inserted into the embedding groove.

[0015] Through the above technical solution, the side module can be inserted into the embedding groove, and then when the mold is closed for injection, the entire mold structure is stable and the embedding groove can play a role in locking the mold. When it is time to open the mold, the top module is moved up first to open the mold.

[0016] The present invention is further configured such that: the side surface of each side module is an inclined surface, and the inner wall of the embedding groove is consistent with the inclination direction of the side module.

[0017] Through the above technical solution, the inclined structure can increase the contact area between the embedding groove and the side module, so that the side of the side module can also receive the clamping force, thereby improving the stability during clamping. At the same time, the inclined structure increases the tendency of the side module to push inward, further improving the structural stability of the side module during injection molding, and preventing it from loosening.

[0018] The present invention is further configured as follows: the injection mold also includes a mold frame, the bottom module is fixed on the mold frame, and a guide plate for linear sliding of the supply side module and the side drawer block is fixed on the mold frame, and a sliding groove is provided on the guide plate to engage with the supply side module or the side drawer block.

[0019] Through the above technical solution, the guide plate cooperates with the slide groove structure to improve the stability of the linear motion of the side module and the side drawer block, ensuring that they can quickly close and open the mold.

[0020] The present invention is further configured as follows: the side module and the side drawer block are both connected with a drawer cylinder for providing linear motion power.

[0021] Through the above technical solution, the pulling cylinder can provide stable power output, so that the mold can be opened and closed at a faster speed and rotate stably for a long time.

[0022] The present invention is further configured as follows: a cross-shaped structural reinforcement rib groove is provided on the inner wall of the first mold cavity.

[0023] Through the above technical solution, the structural reinforcement rib grooves can make the surface of the inspection well body produced have reinforcement ribs distributed on it, thereby improving the structural stability.

[0024] The present invention is further configured as follows: an annular pipe mouth reinforcement rib groove is provided in the second mold cavity and the third mold cavity.

[0025] Through the above technical solution, the pipe mouth reinforcement groove can make the main pipe and branch pipe of the inspection well produced have reinforcement ribs distributed on the surface, thereby improving the structural stability.

[0026] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0027] 1. The overall structure of the mold is small and the cost is low;

[0028] 2. Through the design of the mold cavity, the structure of the injection molded product is stable and the material cost is low;

[0029] 3. The movable parts of the mold are pulled out in a straight line, which makes the mold stable and the demoulding speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural diagram of the inspection well produced in the embodiment;

[0031] Figure 2 is a structural diagram of an embodiment;

[0032] Figure 3 The structural diagram of the top module after the mold is opened in the embodiment

[0033] Figure 4 The structural diagram of the bottom module after the mold is opened in the embodiment;

[0034] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0035] Figure 6 It is a structural diagram of the module on the embodiment side;

[0036] Figure 7 for Figure 6 A partial enlarged view of point B in the middle;

[0037] Figure 8It is the internal structure diagram of the embodiment.

[0038] Figure numerals: 1, well body; 11, main receiving pipe; 12, branch pipe; 2, side module; 21, inclined surface; 22, insert; 23, notch; 3, top module; 31, embedded groove; 32, first core block; 4, bottom module; 41, second core block; 5, side drawer block; 51, third core block; 6, mold frame; 61, guide plate; 62, slide groove; 71, first mold cavity; 72, second mold cavity; 73, third mold cavity; 74, structural reinforcement rib groove; 75, pipe mouth reinforcement rib groove. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0040] An injection mold for producing an inspection well, wherein the inspection well produced includes a well body, a main receiving pipe and a branch pipe for receiving a side discharge pipe, such as Figure 1 As shown, the number of branch pipes in the inspection well can be one or two, and the axes of the branch pipe and the main receiving pipe are perpendicular to each other.

[0041] like Figure 2 As shown, the injection mold includes a mold frame 6, which is used to be fixed on the injection molding machine. A bottom module 4 is fixedly arranged on the mold frame 6, and a side module 2 that can slide linearly along the X-axis direction and a side drawer block 5 that can slide linearly along the Y-axis direction are arranged on the bottom module 4. A top module 3 that can move linearly along the Z-axis direction is also arranged above the side module 2 and the side drawer block 5. When the side drawer block 5, the side module 2 and the top module 3 are closed together on the bottom module 4, a cavity for injection molding into a manhole is formed inside.

[0042] like Figure 2 and Figure 4 As shown, a guide plate 61 for linear sliding of the side module 2 and the side drawer block 5 is fixedly provided on the mold frame 6, and a horizontally extending slide groove 62 is provided on the guide plate 61. The groove section of the slide groove 62 is a square structure, and the side edges of the side module 2 or the side drawer block 5 are provided with a protruding structure and are engaged in the slide groove 62. The side module 2 and the side drawer block 5 are both connected to a pulling cylinder for providing linear motion power, and the pulling cylinder is used to provide power for the linear sliding of the side module 2 and the side drawer block 5.

[0043] like Figure 4 As shown, there are two side modules 2, and they are symmetrical about the center. There are two side drawer blocks 5, and they are symmetrical about the center. The linear motion trajectories of the side modules 2 and the side drawer blocks 5 are perpendicular to each other.

[0044] like Figures 4 to 6As shown, the side module 2 is provided with a first mold cavity 71 for injection molding the well body, a second mold cavity 72 for molding the main socket, and a third mold cavity 73 for molding the branch pipe. The top module 3 is provided with a first core block 32 that can be inserted into the first mold cavity 71 and the second mold cavity 72, and the bottom module 4 is provided with a second core block 41 that can be inserted into the first mold cavity 71. The first core block 32, the second core block 41, and the gap between the first mold cavity 71 and the second mold cavity 72 together form the space between the well body and the main socket. The side drawer block 5 is provided with a third core block 51 that can be inserted into the third mold cavity 73, and the gap between the third mold cavity 73 and the third core block 51 forms a gap for forming the branch pipe.

[0045] The first mold cavity 71 and the second mold cavity 72 are coaxially arranged, and the first mold cavity 71, the second mold cavity 72 and the third mold cavity 73 are all semi-cylindrical structures. The axes of the second mold cavity 72 and the third mold cavity 73 are perpendicular to each other, one end of the second mold cavity 72 and the third mold cavity 73 are connected to the first mold cavity 71 and the ends of the two are connected, and a notch 23 for connection is provided at the connecting portion of the second mold cavity 72 and the third mold cavity 73. The shape of the notch 23 is shown in the figure, and the side wall of the notch 23 is also provided with a plurality of inward depressions, which can improve the fusion degree of the main receiving pipe and the branch pipe on the inspection well.

[0046] like Figure 6 to Figure 7 As shown, the width of the gap 23 is relatively wide, exceeding 10mm, to ensure that the lateral width of the connecting part of the main pipe and the branch pipe of the inspection well is relatively long to avoid fracture. The depth inside the gap 23 is the thickness of the branch pipe plus the thickness of the main pipe joint, and the minimum of both is 6mm. In this way, the material filled in the gap 23 can effectively disperse the pressure of the main pipe to the branch pipe, avoiding the local fracture between the main pipe and the branch pipe.

[0047] like Figure 3 As shown, a groove 31 is provided on the top module 3. When the side modules 2 are closed, the side modules 2 can be inserted into the groove 31. The side surface of each side module 2 is a slope 21, and the inner wall of the groove 31 is consistent with the inclination direction of the side module 2.

[0048] like Figure 6 and Figure 8 As shown, a cross-shaped structural reinforcement groove 74 is provided on the inner wall of the first mold cavity 71. An annular pipe mouth reinforcement groove 75 is provided in the second mold cavity 72 and the third mold cavity 73. An insert 22 is provided on each side module 2, and the insert 22 is detachably connected to the side module 2. The insert 22 is located at the connection point of one of the third mold cavities 73, the first mold cavity 71 and the second mold cavity 72, and the surface of the insert 22 is basically consistent with the surfaces of the other third mold cavities 73, the first mold cavity 71 and the second mold cavity 72.

[0049] The production process of this mold is as follows: Step 1: The side module 2 and the side drawer block 5 are closed on the bottom module 4, and the top module 3 is covered on the top of the side module 2. Step 2: The material is injection molded in the mold cavity and each core of the side module 2. Step 3: The top module 3 is separated from the side module 2, and then the side drawer block 5 and the side module 2 are simultaneously pulled out in four directions. Step 5: The product is ejected from the bottom module 4, and the side module 2, the side drawer block 5, and the top module 3 are closed, and then the next step of injection molding is carried out.

[0050] When the mold is used to produce a single-branch inspection well, the inserts 22 of the two side drawer blocks 5 can be separated and replaced with new inserts 22. The new inserts 22 are thicker and will collide with the outer wall of the third core block 51 when the mold is closed, thereby blocking the cavity entrance of the branch pipe at that position when the material flows.

[0051] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. An injection mold for producing an inspection well, characterized by: The side modules (2) are symmetrical in structure and are provided with a first mold cavity (71) for molding a well body, a second mold cavity (72) for molding a main receiving tube and a third mold cavity (73) for molding a branch tube. The second mold cavity (72) and the third mold cavity (73) are both semi-cylindrical. The axial directions of the second mold cavity (72) and the third mold cavity (73) are perpendicular to each other. One end of the second mold cavity (72) and the third mold cavity (73) are connected to the first mold cavity (71) and the ends of the two are connected. A notch (23) for connection is provided at the connecting portion of the second mold cavity (72) and the third mold cavity (73). A top module (3) and a bottom module (4) are respectively arranged at the top and bottom of the two side modules (2); the top module (3) can move linearly close to or away from the bottom module (4); the linear movement direction of the top module (3) is perpendicular to the linear movement direction of the side module (2); the first mold cavity (71) and the second mold cavity (72) are coaxially arranged; a first core block (32) which can be inserted into the first mold cavity (71) and the second mold cavity (72) is arranged on the top module (3); a second core block (41) which can be inserted into the first mold cavity (71) is arranged on the bottom module (4); the first core block (32), the second core block (41), and the gap between the first mold cavity (71) and the second mold cavity (72) together form a space for a well body and a main bearing pipe; The injection mold further comprises a side withdrawal block (5) which can be linearly withdrawn laterally, the linear movement of the side withdrawal block (5) being perpendicular to the side module (2), the side withdrawal block (5) being provided with a third core block (51) which can be inserted into a third mold cavity (73), the gap between the third mold cavity (73) and the third core block (51) forming a gap for forming a branch pipe; The number of the side drawer blocks (5) is two, the number of the third mold cavities (73) on the side drawer blocks (5) is also two, an insert (22) is provided on the side module (2), the insert (22) is detachably connected to the side module (2), and the insert (22) is located at the connection point of one of the third mold cavities (73), the first mold cavity (71) and the second mold cavity (72); The top module (3) is provided with an embedding groove (31), and when the side modules (2) are closed, the side modules (2) can be inserted into the embedding groove (31).

2. The injection mold for producing an inspection well according to claim 1 is characterized in that: The side surface of each side module (2) is an inclined surface (21), and the inner wall of the embedding groove (31) is consistent with the inclination direction of the side module (2).

3. The injection mold for producing an inspection well according to claim 1 is characterized in that: The injection mold further comprises a mold frame (6), the bottom module (4) being fixed on the mold frame (6), a guide plate (61) for linear sliding of the supply side module (2) and the side drawer block (5) being fixedly provided on the mold frame (6), and a slide groove (62) for engaging with the supply side module (2) or the side drawer block (5) being provided on the guide plate (61).

4. The injection mold for producing an inspection well according to claim 1 is characterized in that: The side module (2) and the side drawer block (5) are both connected to a drawer cylinder for providing linear motion power.

5. The injection mold for producing an inspection well according to claim 1, characterized in that: A cross-shaped structural reinforcement rib groove (74) is provided on the inner wall of the first mold cavity (71).

6. The injection mold for producing an inspection well according to claim 1, characterized in that: Annular pipe mouth reinforcement rib grooves (75) are arranged in the second mold cavity (72) and the third mold cavity (73).

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