A processing mold for double plastic molding of gas support tube

Abstract

The present invention discloses a processing mold for double plastic molding of an air-supported tube, including an upper mold and a lower mold with controlled opening and closing, a core pulling device and a plurality of sliders therebetween, a mold core corresponding to a molding cavity of a product is provided in the upper mold and the lower mold, a main glue feeding unit, a mold core and a pusher unit for demolding are provided between the upper and lower molds, and the characteristic is that: away from the main glue feeding unit, a molding slider and a secondary glue feeding unit for secondary glue coating are provided in sequence on the outer side of the mold core in the lower mold, the molding slider is provided with a primary injection molding groove and a secondary glue coating molding groove distributed along the sliding direction, and a lifting mechanism is provided between the mold core and the lower mold, and on the basis of completing the primary injection molding, the mold core, the core pulling device, the main glue feeding unit and the pusher plate of the pusher unit are lifted as a whole to make room for the displacement of the molding slider, and the molding slider is moved laterally to switch the molding groove. The processing mold of the present invention can realize the injection molding of plastic pipe fittings with different processes and specific material requirements with a set of molds, optimize the mold cost and save energy consumption.

Description

Technical Field

[0001] The invention relates to an improved mold structure, and in particular to a single set injection mold for overmolding using different materials. Background Art

[0002] Injection molding is an effective way to mass-produce various special-shaped parts. Its process has a long history and is becoming more efficient, environmentally friendly and high-quality. Injection molding is a preferred process that can meet the processing and production of various non-standard special-shaped parts. Compared with traditional cutting and punching and milling operations, it has the significant advantages of one-time molding and large-scale production. However, due to the diversity of shapes of injection molded products, a corresponding product often needs to be independently developed and repeatedly trial-produced to meet the product's precision requirements before it can be put into large-scale production.

[0003] With the wide application of various plastic products in various equipment, large machinery, vehicles and ships, the material performance requirements of finished products are also increasing. Especially for plastic assembly, on the one hand, it is hoped that it can maintain a high structural strength to meet the required performance of support and explosion-proof, and on the other hand, it is also urgently needed to have a comfortable touch feeling and anti-collision ability on the surface. However. Due to the different injection molding materials involved, the traditional injection molding process requires two sets of independently designed molds to complete the processing, and in the production process, the semi-finished product of the first injection molding needs to be completely cooled and transferred to the second set of molds for secondary encapsulation injection molding. It can be seen that not only the mold opening cost has increased exponentially, but also the injection molding production efficiency is difficult to improve. Summary of the invention

[0004] The purpose of the present invention is to provide a processing mold for double-plastic molding of an air support tube, so as to solve the mold optimization problem of high precision and secondary encapsulation of the air support tube.

[0005] The technical solution for achieving the above-mentioned purpose of the present invention is a processing mold for double plastic molding of an air support tube, comprising an upper mold and a lower mold with controlled opening and closing, a core pulling and a plurality of sliders therebetween, a mold core is arranged in the upper mold and the lower mold, and the mold core is processed with a molding cavity corresponding to the outer wall of the main body of the air support tube, and a main glue feeding unit, a mold core for shaping the tube mouth and a pushing unit for demolding are arranged between the upper and lower molds corresponding to one end in the length direction of the air support tube, characterized in that: at the other end in the length direction of the air support tube, a molding slider and a secondary molding unit for secondary gluing are arranged in sequence on the outer side of the mold core in the lower mold, a primary injection molding groove and a secondary gluing molding groove are distributed along the sliding direction of the molding slider, and a lifting mechanism is arranged between the mold core and the lower mold, and on the basis of completing the primary injection molding, the mold core, the core pulling, the main glue feeding unit and the pushing plate of the pushing unit are lifted as a whole to make room for the displacement of the molding slider, and the molding slider is moved laterally to switch the molding groove.

[0006] Furthermore, a linearly telescopic side sliding motor is provided on the side of the lower mold at an external position corresponding to the molding slider, and the molding slider is connected and linked to the telescopic arm of the side sliding motor.

[0007] Furthermore, the processing mold is a one-mold, two-cavity type, and the molding slider is provided with a group of two primary injection molding grooves and a group of two secondary overmolding molding grooves arranged in sequence along the length direction, and the movement amplitude of the molding slider corresponds to the two groups of molding grooves being aligned with a pair of core pulling axes in sequence.

[0008] Furthermore, the mold core is arranged across the width of the lower mold, and the lifting mechanisms are arranged in pairs on both sides of the lower mold and are fixedly mounted on both ends of the mold core and lifted and lowered synchronously.

[0009] Furthermore, the lower mold is provided with more than two vertical positioning columns distributed along the width direction, and the mold core is sleeved on the vertical positioning columns to guide the lifting and lowering.

[0010] Furthermore, the mold core is equipped with guide rods along both sides of the lower mold, which are suitable for sleeve connection of the push plate of the push unit, and the push plate moves along the guide rods parallel to the core pulling axis.

[0011] Furthermore, the pushing unit includes a positioning base plate, a push plate and a linear cylinder fixed to the base plate; wherein the positioning base plate is fixed to the side of the lower mold, the push plate is provided with an inverted T-shaped groove extending vertically, the end of the telescopic rod of the linear cylinder is provided with a cap head slidably embedded in the inverted T-shaped groove, and the mold core is provided with a U-shaped groove corresponding to the telescopic rod, and the overall lifting action of the push plate and the mold core avoids the telescopic rod.

[0012] Furthermore, an auxiliary glue feeding block connected to the glue channel of the main glue feeding unit is provided adjacent to the secondary glue feeding unit, and the molding slider is provided with a supplementary glue feeding port beside the primary injection molding groove.

[0013] Furthermore, at the core-pulling position of the primary injection molding groove, the molding slider is connected to the glue channel of the auxiliary glue feeding block through the supplementary glue inlet and completely covers the glue outlet of the secondary glue feeding unit. At the core-pulling position of the secondary overmolding molding groove, the molding slider exposes the glue outlet of the secondary glue feeding unit and blocks the glue channel of the auxiliary glue feeding block.

[0014] Furthermore, the core pulling and the forming cavity are set to have a smooth surface, and the polishing grade is above A2.

[0015] The processing mold using the present invention has substantial characteristics and progress: by integrating a secondary rubber-coated molding slider and different rubber inlet channels with discrete functions in the mold, and using the injection molding machine to control the additional parts of the mold by PLC, continuous injection molding and secondary rubber-coating molding of customized gas support tubes in a single mold are achieved, which greatly saves the cost of mold development and mold trial and improves the efficiency of finished products; at the same time, some mold details that are conducive to improving molding accuracy are retained and optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal assembly structure of the processing mold after the mold is opened.

[0017] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the processing mold is shown. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention will be further described below in conjunction with the accompanying drawings of the embodiments, so that the technical solution of the present invention is easier to understand and grasp, thereby making a clearer definition of the protection scope of the present invention.

[0019] In view of the high cost and low efficiency of the current two-material injection molding products that require multiple molds for staged injection molding, the designers of the present invention, based on their many years of experience in the injection molding industry, have improved and innovated the mold cavity structure and proposed an optimized injection mold for double-molding of air-support tubes, which improves production and processing efficiency by using a single mold.

[0020] like Figure 1 and Figure 2 As shown in the figure, the processing mold for the double plastic molding of the gas support tube includes an upper mold and a lower mold with controlled opening and closing, a core puller 3 and a plurality of sliders 2 therebetween, wherein the upper mold is omitted to clearly present the inner cavity of the mold, and is actually opposite to most of the lower mold. A mold core 11 is provided in the upper mold and the lower mold 1, and the mold core 11 is processed with a molding cavity 111 corresponding to the outer wall of the main part of the gas support tube. Corresponding to one end of the gas support tube in the length direction, a main glue feeding unit 41, a mold core 5 for shaping the tube mouth and a pusher unit for demoulding are provided between the upper and lower molds. As the main feature of the mold improvement, at the other end corresponding to the length of the gas support tube, a molding slider 71 and a secondary glue feeding unit 42 for secondary glue encapsulation are sequentially provided on the outside of the mold core 11 in the lower mold 1. The molding slider 71 is provided with a primary injection molding groove 711 and a secondary glue encapsulation molding groove 712 along the sliding direction. The cavities and sizes of the two molding grooves are slightly different, and a lifting mechanism 8 is provided between the mold core 5 and the lower mold 1. On the basis of completing the primary injection molding, through the transmission action of the lifting mechanism, the mold core 5, the core pulling 3, the main glue feeding unit 41 and the push plate 61 of the pushing unit are lifted as a whole to make room for the displacement of the molding slider 71, and the molding slider 71 can move laterally and switch the molding groove.

[0021] Due to the semicircular structure of the molding groove of the above-mentioned molding slider, its lateral movement will inevitably be blocked by the injection-molded semi-finished product after the first injection molding is completed. Therefore, the mold improvement is committed to separating the upper and lower molds at a controlled distance, and will drive the necessary components such as the core pulling and mold core of the injection-molded semi-finished product as a whole, and lift it to a certain height, so that the molding slider can slide freely in the horizontal direction to meet the purpose of switching the molding groove, and after aligning with the core pulling, the injection-molded semi-finished product is restored to the molding cavity to continue the secondary encapsulation operation. At this time, the above-mentioned molding cavity will exist as a product fixing fixture, and the secondary encapsulation is carried out by the secondary encapsulation unit in the limited space at one end of the mold, which has a positive significance for improving the overall accuracy of the product.

[0022] To understand from a more specific detail, a linear telescopic side sliding motor 72 is provided on the side of the lower mold 1 at the external position corresponding to the molding slider, and the molding slider 71 is connected and linked with the telescopic arm of the side sliding motor 72, that is, the lateral displacement amplitude of the molding slider depends on the output of the side sliding motor, and is generally controlled by the program control debugging of the injection molding machine PLC to meet the precision requirements of the product.

[0023] As can be seen from the preferred embodiment shown in the figure, the processing mold is a one-mold two-cavity type, in which the molding slider 71 is provided with a group of two primary injection molding grooves 711 and a group of two secondary overmolding grooves 712 arranged in sequence along the length direction, and the movement amplitude of the molding slider corresponds to the two groups of molding grooves being aligned with a pair of core pulling axes in sequence.

[0024] As the basis of the lifting action, in addition to the above-mentioned lifting mechanism, the core 5 plays the main role of connecting the core puller 3, the push plate 61, etc. In order to obtain a more ideal lifting effect. The core is set across the width of the lower mold, and the lifting mechanism 8 is arranged in pairs on both sides of the lower mold and fixedly mounted and lifted synchronously with the two ends of the core 5, and is also controlled by the PLC program control of the injection molding machine to ensure accuracy. At the same time, the lower mold 1 is provided with more than two vertical positioning columns 12 distributed along the width, and the core 5 is sleeved on the vertical positioning columns 12 to guide the lifting, so as to help overcome the influence of the lifting action on the product accuracy.

[0025] The pusher unit includes a positioning base plate 62, a push plate 61 and a linear cylinder 63 fixed to the base plate; wherein the positioning base plate 62 is fixed to the side of the lower mold 1, the push plate 61 is provided with an inverted T-shaped groove 611 extending vertically, and the end of the telescopic rod of the linear cylinder 63 is provided with a cap head 631 slidably embedded in the inverted T-shaped groove. It can be seen that the linear cylinder in the pusher unit is positioned relative to the positioning base plate and the lower mold, while the push plate is lifted during the injection molding process, so the cap head slides freely in the inverted T-shaped groove, which can solve the contradiction between the movement and stillness of both parties. On the other hand, the mold core 5 is also provided with a U-shaped groove 51 corresponding to the telescopic rod, so that the overall lifting action of the push plate and the mold core can reliably avoid the telescopic rod.

[0026] As an optimization of the core pulling and demolding of the product, the core 5 is equipped with guide rods 9 along both sides of the lower mold, which are suitable for the push plate 61 of the push unit to be sleeved, so as to ensure that the push plate 61 moves along the guide rods 9 parallel to the core pulling axis.

[0027] Furthermore, from the perspective of perfecting the injection molding glue feeding, an auxiliary glue feeding block 41a connected to the glue path of the main glue feeding unit 41 is also provided near the above-mentioned secondary glue feeding unit 42, and the molding slider 71 is provided with a supplementary glue feeding port 411a beside the primary injection molding groove. During the first injection molding process of the product, the main glue feeding unit 41 can be used to synchronously feed glue from both ends of the product, thereby achieving the ideal pressure strength and product uniformity. The molding slider is at the core-pulling position of the primary injection molding groove, and the supplementary glue feeding port is connected to the glue path of the auxiliary glue feeding block, and completely covers the glue outlet 713 of the secondary glue feeding unit. The molding slider is at the core-pulling position of the secondary encapsulation molding groove, exposing the glue outlet of the secondary glue feeding unit and blocking the glue path of the auxiliary glue feeding block, which is conducive to completing the secondary encapsulation operation.

[0028] As a requirement for mold processing, the core pulling and molding cavity are set to have a smooth surface and a polishing grade of A2 or above.

[0029] From the above detailed description and illustrations of the embodiment of the processing mold of the present invention, it can be seen that it has outstanding substantial characteristics and remarkable progress: by integrating a secondary rubber-coated molding slider and different functionally discrete rubber inlet channels in the mold, and using the injection molding machine to control the additional parts of the mold by PLC, continuous injection molding and secondary rubber-coating molding of customized gas support tubes are achieved in a single mold, which greatly saves the cost of mold development and mold trial, and improves the efficiency of finished products; at the same time, some mold details that are conducive to improving molding accuracy are retained and optimized.

[0030] The above detailed description is intended to deepen the understanding of the injection mold design of the present invention, and is not intended to limit the scope and variability of the application and implementation of this patent. Therefore, any structural changes that are equivalent or similar to the above embodiments of the present invention and can achieve the purpose of the present invention should be regarded as falling within the scope of patent protection of the present invention.

Claims

1. A processing mold for double plastic molding of an air support tube, comprising an upper mold and a lower mold with controlled opening and closing, a core puller and a plurality of slide blocks therebetween, wherein a mold core is provided in the upper mold and the lower mold, and the mold core is processed with a molding cavity corresponding to the outer wall of the main part of the air support tube, and a main glue feeding unit, a mold core for shaping the tube mouth and a pusher unit for demoulding are provided between the upper and lower molds corresponding to one end of the length direction of the air support tube, wherein the main glue feeding unit, a mold core for shaping the tube mouth and a pusher unit for demoulding are provided ... and the main glue feeding unit, a core for shaping the tube mouth and a pusher unit for demoulding are provided, and the main glue feeding unit, a core for shaping the tube mouth and a pusher unit for demoulding are provided, and the main glue feeding unit, a core for shaping the tube mouth and a push At the other end corresponding to the length direction of the gas support tube, a molding slider and a secondary glue feeding unit for secondary encapsulation are sequentially arranged on the outer side of the mold core in the lower mold, and the molding slider is provided with a primary injection molding groove and a secondary encapsulation molding groove, both of which are semicircular structures, along the sliding direction; The mold core is arranged across the width of the lower mold, wherein the lower mold is provided with more than two vertical positioning columns distributed along the width direction, the mold core is sleeved on the vertical positioning columns to guide the lifting, and a lifting mechanism is provided between the mold core and the lower mold, the lifting mechanism is arranged in pairs on both sides of the lower mold and fixedly mounted on both ends of the mold core, and is lifted and lowered synchronously; The mold core is equipped with guide rods for the push plate sleeve of the push unit along both sides of the lower mold, and the push plate moves along the guide rods parallel to the core pulling axis; the push unit includes a positioning base plate, a push plate and a linear cylinder fixed to the base plate; wherein the positioning base plate is fixed to the side of the lower mold, the push plate is provided with an inverted T-shaped groove extending vertically, the end of the telescopic rod of the linear cylinder is provided with a cap head slidably embedded in the inverted T-shaped groove, and the mold core is provided with a U-shaped groove corresponding to the telescopic rod, and the overall lifting action of the push plate and the mold core avoids the telescopic rod; An auxiliary glue feeding block connected to the glue path of the main glue feeding unit is provided adjacent to the secondary glue feeding unit, and the molding slider is provided with a supplementary glue feeding port beside the primary injection molding groove; the molding slider is at the core pulling position of the primary injection molding groove, the supplementary glue feeding port is connected to the glue path of the auxiliary glue feeding block, and completely covers the glue outlet of the secondary glue feeding unit, and the molding slider is at the core pulling position of the secondary overmolding molding groove, exposing the glue outlet of the secondary glue feeding unit and blocking the glue path of the auxiliary glue feeding block; After completing one injection molding, the mold core, core pulling, main glue feeding unit and push plate of the material pushing unit are lifted as a whole to make room for the displacement of the molding slider, and the molding slider is moved laterally to switch the molding groove.

2. The processing mold for double-plastic molding of the gas support tube according to claim 1, characterized in that: A linear telescopic side sliding motor is provided at the side of the lower mold at the external position corresponding to the molding slider, and the molding slider is connected and linked with the telescopic arm of the side sliding motor.

3. The processing mold for double-plastic molding of the gas support tube according to claim 1, characterized in that: The processing mold is a one-mold, two-cavity type, and the molding slider is arranged in sequence along the length direction with a group of two primary injection molding grooves and a group of two secondary overmolding molding grooves, and the movement amplitude of the molding slider corresponds to the two groups of molding grooves being aligned with a pair of core pulling axes in sequence.

4. The processing mold for double-plastic molding of the gas support tube according to claim 1, characterized in that: The core pulling and forming cavity are set to have smooth surfaces, and the polishing grade is above A2.

Images