Injection mold

Abstract

The invention provides an injection mold, and relates to the technical field of molds, the injection mold comprises a base, a lower mold and an upper mold, the lower mold comprises a lower mold body and a plugging part arranged at the bottom of the lower mold body, and the base is provided with a driving part used for driving the plugging part to horizontally move relative to the lower mold body; a transmission part capable of driving the driving part to rotate when the upper mold vertically moves is arranged on the upper mold, and the collision mechanism comprises a pushing part arranged on the transmission part and a beating part arranged at the output end of the pushing part. After an injection product is formed, the bottom of the lower mold can be opened, the product falls down from the lower mold to complete demolding, the product cannot be damaged, in addition, the outer wall of the lower mold can be beaten during injection molding, holes in the product caused by bubbles generated by sputtering of a hot melting material can be prevented, and the product quality is improved. And the demolding speed of a formed product can be increased.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, in particular to an injection mold. Background Art

[0002] Injection molds are tools used to produce plastic products and give them a complete structure and precise dimensions. Injection molding is a process used for mass production of complex-shaped components. Specifically, molten plastic is injected into a mold cavity under high pressure using an injection molding machine. After cooling and solidification, the resulting molded product is formed. While mold structure can vary greatly depending on the type and properties of the plastic, the shape and structure of the product, and the type of injection molding machine, the basic structure remains the same. A mold primarily consists of a gating system, a temperature control system, molding components, and structural components.

[0003] After searching, the application number CN202110510140.3 discloses a new type of injection mold for injection molding, which belongs to the field of injection mold technology, including a lower mold base, wherein the lower mold base is two L-shaped mold bases that are clamped to each other, and the lower mold bases are clamped by an assembly mechanism, and the top of the lower mold base is movably connected with several side plate mechanisms. In the present invention, through the designed lower mold base and assembly mechanism, the first handle can drive the cam to rotate and the top fitting plate to drive the bottom card second engagement block to separate from the first engagement block, and the spring can be forced to push the triangular plate on one side to drive the first slide bar to move out from the lower mold base on the other side, so that the lower mold base can be quickly separated, and then it can effectively facilitate the staff to clean and maintain the interior of the lower mold base, and it can also facilitate demoulding and discharging, effectively reducing the difficulty of assembling the lower mold base, improving the efficiency of assembly and maintenance, facilitating portable production and assembly, and meeting the injection molding production needs under different circumstances.

[0004] Although the injection mold in the existing technology can clean the inside of the mold base and facilitate the assembly of the mold, when demolding, the molded product is generally lifted up from the bottom to be demolded by using a push pin. The mold will stick to the inner wall of the mold due to the high heat. At this time, lifting the product can easily cause damage to the product. In addition, when the molten plastic solution is injected into the mold, sputtering will occur to form bubbles. Therefore, after the product cools, holes will appear inside it, affecting the product quality. Summary of the Invention

[0005] The purpose of the present invention is to address the problems that the existing injection mold is prone to damage to the product during demoulding, and that when injecting hot-melt material, the material solution will generate bubbles due to sputtering in the mold, which affects the quality of the subsequent molded product.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] An injection mold includes a base, a lower mold arranged on the top of the base, and an upper mold arranged above the lower mold, the lower mold including a lower mold body and a sealing component arranged at the bottom of the lower mold body, the base is provided with a driving component for driving the sealing component to move horizontally relative to the lower mold body, the upper mold is provided with a transmission component that can drive the driving component to rotate when the driving component moves vertically, and the top of the base is also provided with a collision mechanism that can knock the outer wall of the lower mold when the upper mold moves vertically, the collision mechanism includes a pushing component arranged on the transmission component and a knocking component arranged at the output end of the pushing component.

[0008] As a preferred technical solution of the present application, a propulsion mechanism is provided on the top of the base for driving the upper mold to move vertically, and the propulsion mechanism includes a support frame arranged on the top of the base, a cylinder arranged on the top of the support frame, and a piston column arranged at the output end of the cylinder and connected to the upper mold, wherein the lower mold body is arranged on the inner side wall of the support frame through a mounting plate.

[0009] As the preferred technical solution of this application, the sealing component includes a sealing seat slidably arranged on both sides of the bottom of the lower mold body and a limit frame arranged on both sides of the bottom of the sealing seat, wherein the side walls at both ends of the lower mold body are provided with limit grooves slidably connected to the limit frame.

[0010] As a preferred technical solution of the present application, the driving component includes a rotating column rotatably arranged at both ends of the side wall of the support frame and a screw rod arranged at the end of the rotating column and threadedly connected to the sealing seat.

[0011] As the preferred technical solution of the present application, the transmission component includes a toothed plate arranged on the side walls at both ends of the upper mold and slidably connected to the support frame, a rotating rod rotatably arranged on both ends of the side walls of the support frame, a gear arranged on the rod wall of the rotating rod, and a first belt transmitted between the rotating rod and the rotating column.

[0012] As a preferred technical solution of the present application, a blower mechanism is provided on the base, and the blower mechanism includes a fan arranged on the top of the base and an air duct arranged at the output end of the fan, wherein a cavity is provided inside the sealing seat, and exhaust holes are provided on opposite sides of the two sealing seats with openings inclined upward, and the end of the air duct away from the fan is connected to the cavity inside the sealing seat.

[0013] As the preferred technical solution of this application, the knocking component includes fixed plates arranged on both sides of the support frame, curved rods slidably arranged on the side walls of the fixed plates, an impact plate arranged between the two relative curved rods, and several rubber balls arranged on the side of the impact plate facing the lower mold.

[0014] As a preferred technical solution of the present application, the pushing component includes a bidirectional cam rotatably arranged on the inner side of the support frame through a rotating shaft, a roller rotatably arranged on the end of the curved rod away from the impact plate and in contact with the bidirectional cam, a spring sleeved on the rod wall of the curved rod between the roller and the fixed plate, and a second belt transmitted between the rotating shaft and the rotating rod.

[0015] As a preferred technical solution of the present application, a receiving groove is provided on the top of the base, and baffles are provided on both sides of the receiving groove.

[0016] As a preferred technical solution of the present application, protective covers for shielding the pushing components and the transmission components are respectively provided on the inner and outer sides of the support frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. During injection molding, the propulsion mechanism is provided to drive the upper mold to move downward and counteract the lower mold. At the same time as the mold is injected, the collision mechanism is provided to knock the outer wall of the lower mold, causing the lower mold to vibrate, thereby causing the hot melt material injected into the lower mold to vibrate, eliminating bubbles inside, and improving the molding quality of the product. This solves the problem in the prior art that bubbles are generated by sputtering when the hot melt material is injected, resulting in holes inside the product during molding, which affects the product quality.

[0019] 2. When the hot-melt material is pressurized and cooled into shape, the upper mold is driven by the propulsion mechanism to move upward away from the lower mold. At this time, the driving component can drive the sealing seat in the blocking component to move toward both sides to open the mold drop opening at the bottom of the lower mold body. At this time, the molded product will fall downward from the inside of the lower mold body to complete demoulding without causing damage to the product, solving the problem in the prior art that the product is easily damaged by pushing the product up from the bottom when demoulding.

[0020] 3. When driving the sealing seat to move and open the lower mold body for demoulding, the blower mechanism can also be used to blow air towards the bottom of the product to speed up the cooling of the product and quickly separate the product from the inner wall of the lower mold body. In addition, the collision mechanism can also be used to hit the outer wall of the lower mold again to make the lower mold vibrate, further increasing the speed of separation between the product and the inner wall of the lower mold, thereby further increasing the demoulding speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall structural diagram of the present invention;

[0022] Figure 2 It is a front view of the present invention;

[0023] Figure 3 It is a bottom view structural diagram of the present invention;

[0024] Figure 4 It is a partial split structure diagram of the present invention;

[0025] Figure 5 It is a cross-sectional structural diagram of the present invention;

[0026] Figure 6 It is a structural diagram of the upper mold and the lower mold of the present invention;

[0027] Figure 7 It is a structural diagram of the transmission component and the pushing component of the present invention;

[0028] Figure 8 This is a structural diagram of the sealing seat of the present invention;

[0029] Figure 9 It is a structural diagram of the knocking component and the pushing component of the present invention.

[0030] Indicated in the figure:

[0031] 1. Base; 101. Support frame; 102. Receiving slot; 103. Baffle; 2. Lower mold; 201. Lower mold body; 202. Sealing seat; 203. Limit frame; 3. Upper mold; 4. Propelling mechanism; 401. Cylinder; 402. Piston column; 5. Driving component; 501. Rotating column; 502. Screw; 6. Transmission component; 601. Tooth plate; 602. Rotating rod; 603. Gear; 604. First belt; 7. Blowing mechanism; 701. Fan; 702. Air duct; 8. Beating component; 801. Curved rod; 802. Impact plate; 803. Rubber ball; 804. Fixed plate; 9. Pushing component; 901. Bidirectional cam; 902. Roller; 903. Spring; 904. Second belt. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0033] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, this embodiment proposes an injection mold, including a base 1, a lower mold 2 arranged on the top of the base 1, and an upper mold 3 arranged above the lower mold 2. The lower mold 2 includes a lower mold body 201 and a blocking component arranged at the bottom of the lower mold body 201. The base 1 is provided with a driving component 5 for driving the blocking component to move horizontally relative to the lower mold body 201. The upper mold 3 is provided with a transmission component 6 that can drive the driving component 5 to rotate when it moves vertically. The top of the base 1 is also provided with a collision mechanism that can knock the outer wall of the lower mold 2 when the upper mold 3 moves vertically. The collision mechanism includes a pushing component 9 arranged on the transmission component 6 and a knocking component 8 arranged at the output end of the pushing component 9;

[0034] First, the propulsion mechanism 4 is provided to drive the upper mold 3 to move downward to contact the lower mold 2 and add hot-melt material. At this time, while the upper mold 3 moves downward, the transmission component 6 can cooperate with the pushing component 9 to drive the knocking component 8 to hit the outer wall of the lower mold 2, so that the lower mold 2 vibrates slightly, thereby eliminating the bubbles inside the hot-melt material and preventing the appearance of holes inside the product after molding that affect the quality. Finally, when the product inside the mold is pressurized and cooled, the propulsion mechanism 4 is provided to drive the upper mold 3 to move upward to separate from the lower mold 2. At this time, the transmission component 6 is provided to Component 6 can drive the driving component 5 to work, and the driving component 5 will control the blocking component at the bottom of the lower mold body 201 to move toward both sides to open the mold drop mouth at the bottom of the lower mold body 201. At this time, the product will fall out from the inside of the lower mold body 201 under the action of gravity, and the demoulding can be completed without causing damage to the bottom of the product. While the upper mold 3 moves upward, the transmission component 6 can also drive the knocking component 8 to knock on the outer wall of the lower mold 2 again by pushing the component 9, causing the lower mold 2 to vibrate, further facilitating the separation of the product from the inner wall of the lower mold 2, and facilitating better demoulding.

[0035] Among them, a propulsion mechanism 4 for driving the upper mold 3 to move vertically is provided on the top of the base 1. The propulsion mechanism 4 includes a support frame 101 arranged on the top of the base 1, a cylinder 401 arranged on the top of the support frame 101, and a piston column 402 arranged at the output end of the cylinder 401 and connected to the upper mold 3. The lower mold body 201 is arranged on the inner wall of the support frame 101 through a mounting plate; when the cylinder 401 is started, the piston column 402 can drive the upper mold 3 to move vertically to counteract or separate from the lower mold 2, thereby facilitating mold injection.

[0036] like Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown, as a preferred embodiment, on the basis of the above-mentioned embodiment, the blocking component further includes a sealing seat 202 slidably arranged on both sides of the bottom of the lower mold body 201 and a limiting frame 203 arranged on both sides of the bottom of the sealing seat 202, wherein both side walls of the lower mold body 201 are provided with a limiting groove slidably connected to the limiting frame 203;

[0037] The driving component 5 includes a rotating column 501 rotatably arranged at both ends of the side wall of the support frame 101 and a screw rod 502 arranged at the end of the rotating column 501 and threadedly connected to the sealing seat 202;

[0038] The transmission component 6 includes a toothed plate 601 provided on the side walls at both ends of the upper mold 3 and slidably connected to the support frame 101, a rotating rod 602 rotatably provided on both ends of the side walls of the support frame 101, a gear 603 provided on the rod wall of the rotating rod 602, and a first belt 604 provided for transmission between the rotating rod 602 and the rotating column 501;

[0039] When the upper mold 3 is moved upward by the cylinder 401, the upper mold 3 will drive the rotating rod 602 provided with the gear 603 to rotate through the tooth plate 601, and the rotating rod 602 will drive the rotating column 501 to rotate through the first belt 604. At this time, the rotating column 501 will drive the screw rod 502 to rotate, thereby driving the sealing seat 202 at the bottom of the lower mold body 201 to move, and through the cooperation of the set limit frame 203 and the limit groove, the sealing seat 202 can slide stably and will not be separated from the lower mold body 201. Therefore, the mold drop opening at the bottom of the lower mold body 201 can be opened, so that the product can fall out from top to bottom under the action of gravity. Compared with the prior art of pushing the product up from bottom to top, the demoulding method of this application can avoid damage to the bottom of the product. When the upper mold 3 is pressed downward against the lower mold 2, it will drive the screw rod 502 to reverse, thereby driving the sealing seat 202 to move in the opposite direction and block the mold drop opening at the bottom of the lower mold body 201 again.

[0040] like Figure 2 、 Figure 6 and Figure 8 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a blower mechanism 7 is provided on the base 1, and the blower mechanism 7 includes a blower 701 provided on the top of the base 1 and an air duct 702 provided at the output end of the blower 701, wherein a cavity is provided inside the sealing seat 202, and exhaust holes with openings inclined upward are provided on opposite sides of the two sealing seats 202, and one end of the air duct 702 away from the blower 701 is communicated with the cavity inside the sealing seat 202;

[0041] When driving the sealing seat 202 to move toward both sides to open the mold opening at the bottom of the lower mold body 201 for demoulding, the fan 701 can also be started. The fan 701 passes water into the cavity inside the sealing seat 202 through the air duct 702, and then blows water to the product inside the lower mold body 201 through several openings tilted upward. The product can be cooled quickly, further improving the speed of separation between the product and the inner wall of the lower mold body 201, thereby increasing the demoulding speed. In addition, the air duct 702 can be set as an elastic hose, so that when the sealing seat 202 moves, it can drive the air duct 702 to move and expand accordingly, which will not affect the blowing.

[0042] In addition, a receiving groove 102 is provided at the top of the base 1, and baffles 103 are provided on both sides of the receiving groove 102; the product falling from the lower mold 2 will fall into the receiving groove 102 at the top of the base 1, and the baffle 103 can be used to block the product to prevent the falling product from falling out of the base 1.

[0043] like Figure 5 、 Figure 7 and Figure 9 As shown, as a preferred embodiment, based on the above method, the striking component 8 further includes fixed plates 804 arranged on both sides of the support frame 101, curved rods 801 slidably arranged on the side walls of the fixed plates 804, an impact plate 802 arranged between two opposing curved rods 801, and a plurality of rubber balls 803 arranged on the side of the impact plate 802 facing the lower mold 2;

[0044] The pushing member 9 includes a bidirectional cam 901 rotatably mounted on the inner side of the support frame 101 via a rotating shaft, a roller 902 rotatably mounted on the end of the curved rod 801 away from the impact plate 802 and in contact with the bidirectional cam 901, a spring 903 sleeved on the rod wall of the curved rod 801 between the roller 902 and the fixed plate 804, and a second belt 904 transmitting between the rotating shaft and the rotating rod 602.

[0045] When the upper mold 3 moves down and contacts the lower mold 2, the upper mold 3 will drive the rotating rod 602 with the gear 603 to rotate through the tooth plate 601, and the rotating rod 602 will drive the two-way cam 901 to rotate through the second belt 904. When the two-way cam 901 rotates to the small head position and contacts the roller 902, it will squeeze the roller 902 and the curved rod 801 to slide toward the outside of the fixed plate 804 and compress the spring 903. When the two-way cam 901 rotates to the large head position and contacts the roller 902, the spring 903 will be released from the force and drive the curved rod 801 to slide back and forth. Therefore, if the two-way cam 901 keeps rotating, it will drive the curved rods 801 on both sides to slide back and forth horizontally, thereby driving the impact plate 80 2 hits the outer wall of the lower mold 2 back and forth, causing the lower mold 2 to vibrate, and then the hot-melt material inside it vibrates, eliminating bubbles inside, and preventing the formation of air holes inside the product after molding that affect the product quality. When the upper mold 3 moves up and separates from the lower mold 2 after the product is formed, the tooth plate 601 will drive the two-way cam 901 to rotate, thereby driving the impact plate 802 to move back and forth again to hit the lower mold 2, causing the lower mold 2 to vibrate, thereby accelerating the separation speed of the product from the inner wall of the lower mold 2, thereby further improving the demoulding speed. In addition, the inner wall of the impact plate 802 is provided with a rubber ball 803, which can cushion the lower mold 2 and prevent the impact plate 802 from scratching the outer wall of the lower mold 2.

[0046] In order to prevent the pushing component 9 and the transmission component 6 from being affected by collision with foreign objects and affecting the normal demoulding work, protective covers are respectively provided on the inner and outer sides of the support frame 101 for shielding the pushing component 9 and the transmission component 6; the pushing component 9 and the transmission component 6 are covered by the anti-slip cover, which can prevent foreign objects from contacting the running pushing component 9 and the transmission component 6, which can not only improve safety, but also prevent the demoulding work from being affected.

[0047] The working principle of the present invention is: after the product inside the mold is formed, when the upper mold 3 is driven to move upward by the cylinder 401, the upper mold 3 will drive the rotating rod 602 equipped with a gear 603 to rotate through the tooth plate 601, and the rotating rod 602 will then drive the rotating column 501 to rotate through the first belt 604. At this time, the rotating column 501 will drive the screw rod 502 to rotate, and then drive the sealing seat 202 at the bottom of the lower mold body 201 to move, and will not separate from the lower mold body 201. Therefore, the mold drop mouth at the bottom of the lower mold body 201 can be opened, so that the product falls out from top to bottom under the action of gravity. Compared with the prior art of lifting the product from bottom to top, the demoulding method of this application can avoid damage to the bottom of the product.

[0048] In addition, when driving the sealing seat 202 to move toward both sides to open the mold drop opening at the bottom of the lower mold body 201 for demoulding, the fan 701 can also be started. The fan 701 passes water into the cavity inside the sealing seat 202 through the air duct 702, and then blows water to the product inside the lower mold body 201 through several openings with upward-tilted exhaust holes, so that the product can be quickly cooled, further improving the speed of separation of the product from the inner wall of the lower mold body 201, thereby increasing the demoulding speed.

[0049] In addition, when the upper mold 3 is driven upward by the cylinder 401 after the injection molding is completed, the upper mold 3 will also drive the rotating rod 602 equipped with the gear 603 to rotate through the tooth plate 601, and the rotating rod 602 will drive the bidirectional cam 901 to rotate through the second belt 904. When the bidirectional cam 901 rotates to the small head part and contacts the roller 902, it will squeeze the roller 902 and the curved rod 801 to slide toward the outside of the fixed plate 804 and compress the spring 903. When the bidirectional cam 901 rotates to the large head part and contacts the roller 902, the spring 90 3 will be released and drive the curved rod 801 to slide back and forth to reset. Therefore, the continuous rotation of the two-way cam 901 will drive the curved rods 801 on both sides to slide back and forth horizontally, thereby driving the impact plate 802 to impact the outer wall of the lower mold 2 back and forth, causing the lower mold 2 to vibrate slightly, thereby accelerating the separation speed of the product from the inner wall of the lower mold 2, thereby further improving the demoulding speed. In addition, the inner wall of the impact plate 802 is provided with a rubber ball 803, which can cushion the lower mold 2 and prevent the impact plate 802 from scratching the outer wall of the lower mold 2.

[0050] In addition, when the upper mold 3 is driven downward by the cylinder 401 to counteract the lower mold 2 for injection molding, the upper mold 3 will also drive the two-way cam 901 to rotate through the tooth plate 601, so that it can drive the impact plate 802 to move back and forth again to hit the lower mold 2, causing the lower mold 2 to vibrate, and then the hot-melt material inside it to vibrate, eliminating the bubbles inside, and preventing the appearance of air holes inside the product after molding, affecting the product quality.

[0051] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; all technical solutions and improvements that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. An injection mold, comprising a base, a lower mold arranged on the top of the base, and an upper mold arranged above the lower mold, characterized in that: The lower mold includes a lower mold body and a sealing component arranged at the bottom of the lower mold body. The base is provided with a driving component for driving the sealing component to move horizontally relative to the lower mold body. The upper mold is provided with a transmission component that can drive the driving component to rotate when it moves vertically. The top of the base is also provided with a collision mechanism that can knock on the outer wall of the lower mold when the upper mold moves vertically. The collision mechanism includes a pushing component arranged on the transmission component and a knocking component arranged at the output end of the pushing component.

2. The injection mold according to claim 1, characterized in that: A propulsion mechanism is provided on the top of the base for driving the upper mold to move vertically. The propulsion mechanism includes a support frame arranged on the top of the base, a cylinder arranged on the top of the support frame, and a piston column arranged at the output end of the cylinder and connected to the upper mold, wherein the lower mold body is arranged on the inner side wall of the support frame through a mounting plate.

3. An injection mold according to claim 2, characterized in that: The blocking component includes a sealing seat slidably arranged on both sides of the bottom of the lower mold body and a limit frame arranged on both sides of the bottom of the sealing seat, wherein the side walls at both ends of the lower mold body are provided with limit grooves slidably connected to the limit frame.

4. The injection mold according to claim 3, characterized in that: The driving component includes a rotating column rotatably arranged at both ends of the side wall of the support frame and a screw rod arranged at the end of the rotating column and threadedly connected to the sealing seat.

5. The injection mold according to claim 4, characterized in that: The transmission component includes a toothed plate arranged on the side walls at both ends of the upper mold and slidably connected to the support frame, a rotating rod rotatably arranged on both ends of the side walls of the support frame, a gear arranged on the rod wall of the rotating rod, and a first belt transmitted between the rotating rod and the rotating column.

6. The injection mold according to claim 3, characterized in that: A blower mechanism is provided on the base, and the blower mechanism includes a fan arranged on the top of the base and an air duct arranged at the output end of the fan, wherein a cavity is provided inside the sealing seat, and exhaust holes with openings inclined upward are provided on opposite sides of the two sealing seats, and the end of the air duct away from the fan is connected to the cavity inside the sealing seat.

7. The injection mold according to claim 5, characterized in that: The knocking component includes fixed plates arranged on both sides of the support frame, curved rods slidably arranged on the side walls of the fixed plates, an impact plate arranged between two opposite curved rods, and several rubber balls arranged on the side of the impact plate facing the lower mold.

8. The injection mold according to claim 7, characterized in that: The pushing component includes a two-way cam rotatably arranged on the inner side of the support frame through a rotating shaft, a roller rotatably arranged on the end of the curved rod away from the impact plate and in contact with the two-way cam, a spring sleeved on the rod wall of the curved rod between the roller and the fixed plate, and a second belt transmitted between the rotating shaft and the rotating rod.

9. The injection mold according to claim 1, characterized in that: A receiving groove is provided on the top of the base, and baffles are provided on both sides of the receiving groove.

10. The injection mold according to claim 2, characterized in that: The inner side and the outer side of the support frame are respectively provided with protective covers for shielding the pushing component and the transmission component.

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