Delayed core pulling die for making double threaded connection seat

Abstract

The invention discloses a delayed core-pulling die-drawing die for preparing a double-threaded connection seat, comprising an upper die seat, an upper die plate, an upper die core, an oblique push rod, an oblique push slider and a mold block which are symmetrically arranged on the left and right, a lower die core, a lower die plate, a lower die seat, a guide column and guide sleeve assembly, an ejector assembly for pushing the product out of the mold, and a delayed core-pulling assembly for forming the inner cavity and center hole of a shrinking clamping jaw of the double-threaded connection seat. The delayed core-pulling assembly comprises a compression spring and a pressing screw arranged in the upper die plate, a lifting and lowering and sliding limit block and a conical upper core-pulling die arranged in the upper die core, and a positioning sleeve and a lower core-pulling die arranged in the lower die core and the lower die plate. The lower core-pulling die cooperates with the shaft hole of the positioning sleeve. The mold utilizes the conical upper core-pulling delayed die-drawing die to completely form the inner cavity of the shrinking clamping jaw. The remaining parts of the product structure are formed by the cooperation of the mold block, the upper die core, the lower die core and the lower core-pulling die, thereby eliminating the tedious processing of equipment such as CNC machine tools, improving production efficiency, and improving energy efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mold equipment, and in particular to a delayed core-pulling and die-drawing mold for preparing a double-threaded connection seat. Background Art

[0002] There are many types of existing engineering communication cable connectors. Especially when the plug and socket are connected at the cable connector, it is necessary to have a good sealing effect, including good waterproof, dustproof, corrosion-resistant and shock-proof effects. A relatively common double-threaded connector that can clamp the outer plastic of the cable to achieve a sealing effect is Figure 4 and Figure 5 , which includes an upper threaded section, a lower threaded section, a middle hexagonal tightening table and a shrinking jaw that are integrally arranged, wherein the shrinking jaw annular array is arranged on the outer edge of the upper threaded section, and a pressing chuck is arranged on the inner side of the upper edge, and the wall thickness of the shrinking jaw is also smaller than the wall thickness of the upper threaded section, forming a stepped hole inside the through hole. Therefore, from the perspective of the injection molding production process, the structure of the inner cavity part of the shrinking jaw is difficult to be formed by the mold core cavity, and it is not convenient to open the mold in the upper and lower directions, and a threaded structure is also arranged in the horizontal direction, which makes it difficult to produce such products with molds. However, since such connectors only need to be prepared by plastic, it is really a waste of resources to use CNC machine tools and machining centers for preparation, the energy efficiency ratio is too low, the cost is too high, and it is not conducive to improving the production efficiency of the product. For this reason, it is necessary for our company to innovatively develop a new type of mold that can overcome the mold preparation process difficulties of such plastic connectors with shrinking jaws and whose inner cavity diameter is larger than the diameters of the upper and lower ports, eliminate the cumbersome processing of CNC machine tools and other equipment, improve the production efficiency of products, and improve the energy efficiency ratio and reduce costs. Summary of the invention

[0003] Purpose of the invention: In view of the background technology, in order to overcome the difficulties in producing and preparing products such as plastic connecting sockets with shrinking jaws and whose inner cavity diameter is larger than the diameters of the upper and lower ports, and the problems of low energy efficiency, high cost and low production efficiency in precise processing using equipment such as CNC machine tools, we specially designed a mold that is conducive to the mold opening of such products, so as to save the tedious processing of equipment such as CNC machine tools, improve the production efficiency of the products, and improve the energy efficiency and reduce costs.

[0004] The technical solutions adopted to solve the above problems are:

[0005] A delayed core-pulling die for preparing a double-threaded connection seat, comprising an upper die seat, an upper die plate, an upper die core, a left-right symmetrically arranged oblique push rod, an oblique push slider and a mold block, a lower die core, a lower die plate, a lower die seat, a guide column and guide sleeve assembly, an ejector assembly for ejecting the product out of the mold, and a delayed core-pulling assembly for forming a shrinking jaw inner cavity and a center hole of the double-threaded connection seat.

[0006] The center of the upper mold base is provided with an injection port, the injection port is connected to the runner opened in the center of the upper mold plate, the runner is connected to the branch channel opened in the upper mold core, and is connected to the product cavity composed of the upper mold core, the lower mold core, the left and right symmetrical mold blocks and the delayed core pulling assembly.

[0007] The upper die core is embedded in the lower end surface of the upper die plate, and the center of the lower end surface of the upper die core is provided with an outer curved surface of the shrinking jaws of the molded product and a gap groove structure between the pressing chucks.

[0008] The oblique push rod slides in cooperation with the oblique sliding hole axial hole obliquely opened in the middle of the oblique push slider, the oblique push slider is fixedly connected with a mold block on the side facing the mold cavity, and the mold block is provided with a contoured curved surface of half of the upper thread segment and the lower thread segment of the molded product on the side facing the mold cavity, and the other half of the upper thread segment and the lower thread segment are molded by the aligned mold block with the same principle and structure.

[0009] The lower mold core is embedded in the upper end surface of the lower mold plate, and supports the left and right side blocks to accurately splice and match the molding cavity structure. A positioning hole is opened in the center of the lower mold core, and the positioning hole cooperates with the positioning sleeve of the delayed core pulling assembly to accurately locate the mold closing position of the positioning sleeve.

[0010] The delayed core pulling assembly includes a compression spring and a pressing screw arranged in the upper mold plate, a lifting and sliding limit block and a conical upper core pulling arranged in the upper mold core, and a positioning sleeve and a lower core pulling arranged in the lower mold core and the lower mold plate.

[0011] The upper end of the compression spring is in contact with the upper die seat, and the lower end of the compression spring is in contact with the nut of the pressing screw. The pressing screw is threadedly matched with the limit block. The limit block slides vertically with the limit hole set on the upper end surface of the upper die core. The lower end of the limit block is fixedly connected to the conical upper core puller. The conical upper core puller cooperates with the conical hole opened in the center of the upper die core, so that the contour structure of the inner cavity of the shrinking clamping claw set at the lower end of the conical upper core puller is embedded in the cavity to form the inner wall surface of the shrinking clamping claw, and waits for the upper die seat and the upper template, When the upper mold core opens upward, the compression spring presses the limit block and the conical upper core pull, so that the inner cavity of the shrinking jaw formed by the conical upper core pull remains stationary, and only the outer curved surface of the shrinking jaw and the gap groove structure between the pressing chucks are demoulded and ejected. Then, after the limit block reaches the specified stroke, the conical upper core pull is pulled upward with a delay. When the outer wall of the shrinking jaw has been demoulded, all the pressing chucks can bend outward to facilitate the smooth demoulding of the conical upper core pull, thereby completing the molding requirements of the inner cavity of the shrinking jaw.

[0012] The lower core pull is sleeved with the axial hole of the positioning sleeve, the lower end of the lower core pull is fixedly connected to the lower die seat, the upper end of the lower core pull is provided with a through hole inner wall profiling structure of the through hole of the formed product, and is embedded in the cavity to form the through hole inner wall of the formed product, the lower end of the positioning sleeve is connected to the push assembly, and the push assembly drives the lower end surface of the product to be ejected from the mold,

[0013] The ejector pin assembly comprises an ejector plate and a guide rod and guide sleeve assembly. The four corners of the ejector plate are provided with guide rod and guide sleeve assemblies to ensure that the ejector plate can perform vertical lifting and lowering movements. A positioning sleeve is connected to the ejector plate.

[0014] Furthermore, cooling pipes are provided inside the upper mold core, the mold block and the lower mold core for quickly cooling and shaping the product after injection molding.

[0015] Furthermore, the inclined push rod is fixedly connected to the lower end surface of the upper template, and utilizes the lifting action of the upper template to drive the inclined push slider to slide horizontally outward. Slide rails are provided on both sides of the inclined push slider, and the slide rails cooperate with the slide grooves provided on the upper end surface of the lower template to slide linearly.

[0016] Furthermore, a positioning groove is arranged at the center of the upper end surface of the lower core pulling member, and a positioning platform is arranged at the lower end surface of the conical upper core pulling member, and the positioning platform cooperates with the positioning groove.

[0017] The beneficial effects of the present invention are:

[0018] The delayed core-pulling die for preparing a double-threaded connector overcomes the difficulties in producing and preparing products such as a plastic connector with a shrinking jaw and an inner cavity diameter greater than the diameters of the upper and lower ports. The inner cavity of the shrinking jaw is perfectly formed by utilizing a tapered upper core-pulling delayed die-pulling method, and the remaining parts of the product structure are formed by the cooperation of a mold block, an upper mold core, a lower mold core and a lower core-pulling die, thereby eliminating the tedious processing of CNC machine tools and other equipment, improving the production efficiency of the product, and improving the energy efficiency ratio and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of a delayed core-pulling die-drawing mold for preparing a double-threaded connection seat in this embodiment;

[0020] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0021] Figure 3 It is a partial structural schematic diagram of the delayed core pulling assembly described in this embodiment;

[0022] Figure 4 It is a three-dimensional diagram of an existing double-threaded connection seat;

[0023] Figure 5 It is a cross-sectional view of an existing double-threaded connection seat;

[0024] Among them, 1-injection port, 2-upper mold base, 3-upper cooling pipe, 4-upper mold plate, 5-guide column and guide sleeve assembly, 6-limiting plate, 7-lower cooling pipe, 8-lower mold plate, 9-lower mold base, 10-lower core pulling, 11-pushing plate, 12-lower mold core, 13-mold block, 14-oblique push slider, 15-oblique push rod, 16-upper mold core, 17-compression spring, 18-conical upper core pulling, 19-pressing chuck, 20-profile structure of the inner cavity of the shrinking clamp, 21-positioning platform, 22-upper threaded section, 23-lower threaded section, 24-profile structure of the inner wall of the through hole, 25-middle hexagonal tightening platform, 26-step hole, 27-limiting block, 28-pressing screw, 29-positioning sleeve, 30-shrinking clamp, 31-through hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-5 The present embodiment proposes a delayed core-pulling die for preparing a double-threaded connection seat, comprising an upper die seat 2, an upper die plate 4, an upper die core 16, oblique push rods 15, oblique push sliders 14 and a mold block 13 arranged symmetrically on the left and right, and a lower die core 12, a lower die plate 8, a lower die seat 9, a guide pin and guide sleeve assembly 5, an ejector pin assembly for ejecting the product from the mold, and a delayed core-pulling assembly for forming the inner cavity and center hole of the shrinking jaw 30 of the double-threaded connection seat.

[0027] See also Figure 1 An injection port 1 is provided at the center of the upper mold base 2, and the injection port 1 is connected to a runner opened at the center of the upper mold plate 4. The runner is connected to a branch channel opened in the upper mold core 16, and is connected to a product cavity composed of the upper mold core 16, the lower mold core 12, the left and right symmetrical mold blocks 13 and the delayed core pulling assembly.

[0028] The upper die core 16 is embedded in the lower end surface of the upper die plate 4 , and the center of the lower end surface of the upper die core 16 is provided with an outer curved surface of the shrinking jaw 30 of the molded product and a gap groove structure between the pressing chuck 19 .

[0029] The oblique push rod 15 slides in cooperation with the oblique sliding hole axial hole obliquely opened in the middle of the oblique push slider 14. The oblique push slider 14 is fixedly connected with a mold block 13 on the side facing the mold cavity. The mold block 13 is provided with a contoured curved surface of half of the upper thread segment 22 and the lower thread segment 23 of the molded product on the side facing the mold cavity. The other half of the upper thread segment 22 and the lower thread segment 23 are molded by the aligned mold block 13 with the same principle and structure.

[0030] The lower mold core 12 is embedded in the upper end surface of the lower mold plate 8, and supports the left and right side blocks 13 to accurately splice and match the molding cavity structure. A positioning hole is opened in the center of the lower mold core 12, and the positioning hole cooperates with the positioning sleeve 29 of the delayed core pulling assembly to accurately locate the mold closing position of the positioning sleeve 29.

[0031] See also Figure 1 and Figure 3 The delayed core pulling assembly includes a compression spring 17 and a pressing screw 28 arranged in the upper mold plate 4, a limit block 27 and a conical upper core pulling 18 that can be raised and lowered and slid arranged in the upper mold core 16, and a positioning sleeve 29 and a lower core pulling 10 arranged in the lower mold core 12 and the lower mold plate 8.

[0032] See also Figure 2 and 3 The upper end of the compression spring 17 contacts with the upper die seat 2, and the lower end of the compression spring 17 contacts with the nut of the pressing screw 28. The pressing screw 28 is threadedly matched with the limit block 27. The limit block 27 slides vertically with the limit hole set on the upper end surface of the upper die core 16. The lower end of the limit block 27 is fixedly connected with the conical upper core 18. The conical upper core 18 cooperates with the conical hole opened in the center of the upper die core 16, so that the profiling structure 20 of the inner cavity of the shrinking clamp 30 set at the lower end of the conical upper core 18 is embedded in the cavity to form the inner wall surface of the shrinking clamp 30, and wait for the upper die seat 2 and the upper die When the plate 4 and the upper mold core 16 are opened upward, the compression spring 17 presses the limit block 27 and the conical upper core pulling 18, so that the inner cavity of the shrinking jaw 30 formed by the conical upper core pulling 18 remains stationary, and only the outer curved surface of the shrinking jaw 30 and the gap groove structure between the pressing chuck 19 are demoulded and ejected from the mold. Then, after the limit block 27 reaches the specified stroke, the conical upper core pulling 18 is pulled upward with a delay. When the outer wall of the shrinking jaw 30 has been demoulded, all the pressing chucks 19 can bend outward to facilitate the smooth demoulding of the conical upper core pulling 18, thereby completing the molding requirements for the inner cavity of the shrinking jaw 30.

[0033] See also Figure 1 The lower core pull 10 is fitted with the axial hole of the positioning sleeve 29, the lower end of the lower core pull 10 is fixedly connected to the lower die seat 9, the upper end of the lower core pull 10 is provided with a through hole 31 inner wall profiling structure 24 of the through hole 31 of the molded product, and is embedded in the cavity to mold the inner wall of the through hole 31 of the molded product, the lower end of the positioning sleeve 29 is connected to the ejection component, and the lower end surface of the product is lifted by the ejection component to realize demolding.

[0034] The ejector pin assembly includes an ejector plate 11 and a guide rod and guide sleeve assembly. The four corners of the ejector plate 11 are provided with guide rod and guide sleeve assemblies to ensure that the ejector plate 11 can perform vertical lifting action. The ejector plate 11 is connected to a positioning sleeve 29 .

[0035] A further embodiment is to refer to Figure 1The upper mold core 16, the mold block 13 and the lower mold core 12 are all provided with cooling pipes for quickly cooling and shaping the product after injection molding.

[0036] A further embodiment is to refer to Figure 1 and Figure 3 The inclined push rod 15 is fixedly connected to the lower end surface of the upper template 4. The lifting action of the upper template 4 is used to drive the inclined push slider 14 to slide horizontally outward. Slide rails are provided on both sides of the inclined push slider 14. The slide rails cooperate with the slide grooves provided on the upper end surface of the lower template 8 to slide linearly.

[0037] A further embodiment is to refer to Figure 2 A positioning groove is provided at the center of the upper end surface of the lower core pull 10, and a positioning platform 21 is provided at the lower end surface of the conical upper core pull 18. The positioning platform 21 cooperates with the positioning groove to ensure that the conical upper core pull and the lower core pull are accurately docked, so that the wall thickness of the product is uniform.

[0038] The above describes in detail the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes, modifications, substitutions and variations can be made within the knowledge scope of ordinary technicians in the field without departing from the spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A delayed core-pulling and demolding die for manufacturing a double-threaded connection seat, comprising an upper die base, an upper template, an upper die core, obliquely pushing rods, obliquely pushing sliders and die blocks arranged symmetrically on the left and right, as well as a lower die core, a lower template, a lower die base, a guide pillar and guide sleeve assembly, and a thimble assembly for pushing the product out of the mold. It is characterized in that: and a delayed core-pulling assembly for forming the inner cavity of the necking chuck and the central hole of the double-threaded connection seat. The delayed core-pulling assembly includes a compression spring, a pressing screw arranged in the upper template, a liftable and slidable limit block and a conical upper core-pulling member arranged in the upper die core, as well as a positioning sleeve and a lower core-pulling member arranged in the lower die core and the lower template. The upper end of the compression spring contacts the upper die base, the lower end of the compression spring contacts the nut of the pressing screw, the pressing screw is screwed and matched with the limit block, the limit block makes a vertical sliding movement in the limit hole arranged on the upper end surface of the upper die core, the lower end of the limit block is fixedly connected with the conical upper core-pulling member, and the conical upper core-pulling member is matched with the conical hole opened in the center of the upper die core, so that the profiling structure of the inner cavity of the necking chuck arranged at the lower end of the conical upper core-pulling member is embedded in the cavity to form the inner wall surface of the necking chuck. When the upper die base, the upper template and the upper die core are opened upward, the compression spring presses the limit block and the conical upper core-pulling member, so that the inner cavity of the necking chuck formed by the conical upper core-pulling member remains stationary, only the outer curved surface of the necking chuck and the gap groove structure between the pressing chucks are demolded and taken out of the mold. Subsequently, after the limit block reaches the specified stroke, the conical upper core-pulling member is pulled upward for demolding with a delay. In the case where the outer wall of the necking chuck has been demolded, all the pressing chucks can be bent outward to facilitate the smooth demolding of the conical upper core-pulling member and complete the forming requirement of the inner cavity of the necking chuck. The lower core-pulling member is sleeved through the shaft hole of the positioning sleeve, the lower end of the lower core-pulling member is fixedly connected with the lower die base, the upper end of the lower core-pulling member is provided with a profiling structure of the inner wall of the through hole for forming the product through hole and is embedded in the cavity to form the inner wall of the product through hole. The lower end of the positioning sleeve is connected with the pushing assembly and is driven by the pushing assembly to lift the lower end surface of the product for demolding. The thimble assembly includes a pushing plate and a guide rod and guide sleeve assembly. Guide rod and guide sleeve assemblies are arranged at the four corners of the pushing plate to ensure that the pushing plate makes a vertical lifting movement. The pushing plate is connected with the positioning sleeve.

2. The delayed core-pulling and demolding die for manufacturing a double-threaded connection seat according to claim 1. It is characterized in that: An injection port is arranged at the center of the upper die base. The injection port is communicated with the runner opened at the center of the upper template. The runner is communicated with the sub-runner opened in the upper die core and is communicated with the product cavity formed by the upper die core, the lower die core, the die blocks symmetrically arranged on the left and right sides and the delayed core-pulling assembly.

3. The delayed core-pulling and demolding die for manufacturing a double-threaded connection seat according to claim 1. It is characterized in that: The upper die core is embedded in the lower end surface of the upper template. The center of the lower end surface of the upper die core is provided with the outer curved surface of the necking chuck for forming the product and the gap groove structure between the pressing chucks.

4. The delayed core-pulling and demolding die for manufacturing a double-threaded connection seat according to claim 1. It is characterized in that: The inclined push rod slides in cooperation with the inclined sliding hole axial hole obliquely opened in the middle of the inclined push slider, the inclined push slider is fixedly connected with a mold block on the side facing the mold cavity, and the mold block is provided with a contoured curved surface of half of the upper thread segment and the lower thread segment of the molded product on the side facing the mold cavity, and the other half of the upper thread segment and the lower thread segment are molded by the aligned mold block with the same principle and structure.

5. The delayed core-pulling die for preparing a double-threaded connection seat according to claim 1, Features: The lower mold core is embedded in the upper end surface of the lower mold plate, and supports the left and right side blocks to accurately splice and match the molding cavity structure. A positioning hole is opened in the center of the lower mold core, and the positioning hole cooperates with the positioning sleeve of the delayed core pulling assembly to accurately locate the mold closing position of the positioning sleeve.

6. The delayed core-pulling die for preparing a double-threaded connection seat according to claim 1, Features: The upper die core, the mold block and the lower die core are all provided with cooling pipes.

7. The delayed core-pulling die for preparing a double-threaded connection seat according to claim 4, Features: The inclined push rod is fixedly connected to the lower end surface of the upper template, and utilizes the lifting action of the upper template to drive the inclined push slider to slide horizontally outward. Slide rails are arranged on both sides of the inclined push slider, and the slide rails cooperate with the slide grooves arranged on the upper end surface of the lower template to slide linearly.

8. The delayed core-pulling die for preparing a double-threaded connection seat according to claim 1, Features: A positioning groove is arranged at the center of the upper end surface of the lower core pulling part, and a positioning platform is arranged at the lower end surface of the conical upper core pulling part, and the positioning platform cooperates with the positioning groove.

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