Novel plastic mold protection device

Abstract

The utility model provides a novel plastic mold protection device which comprises a shell, an upper mold mounted at the top end of the shell, a mold plate mounted at the center in the shell, a top plate mounted at the bottom end in the shell, a plurality of ejector pins mounted at the center of the top plate, guide rods mounted at four corners of the top plate, and second springs mounted on the outer sides of the guide rods. The center of the right upper end of the shell is provided with a material guiding pipe, the lower end of the material guiding pipe is provided with a collecting box, and the right upper end of the front end of the shell is provided with a limiting device. According to the novel plastic mold protection device, through the structures such as the trapezoidal groove, the trapezoidal limiting strip, the limiting device and the clamping mechanism, the effects of avoiding displacement of the collecting box and rapidly demolding can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic molds, and more specifically, relates to a new type of plastic mold protection device. Background Art

[0002] Plastic mold is known as the "mother of industry". It is the abbreviation of a combined mold used for compression molding, extrusion molding, injection molding, blow molding and low-foaming molding. The working temperature of plastic molds in the prior art is relatively high. Most of the ejector pins of plastic molds are in direct contact with the template and are easily deformed at high temperatures, resulting in the ejector pin being unable to eject the plastic product from the inside of the plastic mold, reducing the demoulding efficiency.

[0003] In view of the above problems, regarding the technical problem that the ejector pin of the existing plastic mold is easy to deform at high temperature, after a lot of searches, a plastic mold protection device with patent number CN214872038U was found, which includes a shell, and the left and right sides of the inner wall of the shell are provided with a slide groove, and a slider is slidably installed inside the slide groove. The inner top surface of the slide groove is provided with an elastic component, and a template is fixedly connected between the two sliders. The upper surface of the shell is provided with an upper mold; by setting the ejector pin, pulling the handle, the push rod drives the connecting rod to move, so that the connecting rod drives the card block one to squeeze the spring two, when the card block one is separated from the inside of the card slot one, the elastic force of the spring one is used to push the ejector plate upward, so that the ejector pin pushes the template upward, thereby quickly demolding the plastic product inside the shell, avoiding the ejector pin from directly contacting with the template to deform and fail to eject the plastic product, thereby improving the demolding efficiency of the plastic product, and at the same time providing a slider to limit the position of the template to avoid the template being ejected from the shell, thereby improving the stability of the device, but the technical solution provided by the patent has the following problems:

[0004] (1) When the top plate is reset, the block will get stuck on the top plate for a while, making it impossible to reset the top plate. At this time, the handle must be pulled again to move the block into the receiving groove, or the handle must be pulled and not released until the top plate is reset, which brings inconvenience to the injection molding process;

[0005] (2) The device does not limit the left-right displacement of the collection box. Every time the top plate hits the template, a slight vibration will be generated, and other devices used for mold injection will also generate vibration during operation, which will cause the collection box to move out of the second card slot.

[0006] The utility model can prevent the collection box from displacement and quickly demould. Utility Model Content

[0007] The utility model aims to solve the technical problems raised by the above-mentioned background technology and provide a novel plastic mold protection device to achieve the effects of avoiding displacement of the collection box and rapid demoulding.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a novel plastic mold protection device, comprising: a shell, an upper mold is installed on the top of the shell, a template is installed in the center of the shell, a top plate is installed at the bottom of the shell, a plurality of ejectors are installed in the center of the top plate, guide rods are installed at the four corners of the top plate, a second spring is installed on the outside of the guide rod, a clamping mechanism is installed in the center of the bottom end of the top plate, a material guide tube is installed in the center of the upper right end of the shell, a collection box is installed at the lower end of the material guide tube, and a limiting device is installed at the upper right end of the front end of the shell.

[0009] A further preferred solution is that a buffer groove is provided in the center of the left and right side walls inside the shell, a first magnetic strip is installed at the top of the buffer groove, and a second magnetic strip is installed at the bottom of the template side wall.

[0010] A further preferred solution is that a trapezoidal groove is provided at the upper right end of the shell, and a trapezoidal limiting strip that fits with the trapezoidal groove is installed at the left end of the collection box.

[0011] A further preferred solution: the limit device includes: a fixed block, an upper slide, a limit block, a lower slide and a first spring, a limit block is installed on the upper right end of the front end of the shell, a plurality of first springs are connected to the left end of the limit block, a fixed block is connected to the left end of the first spring, an upper slide is connected to the upper end of the fixed block, a lower slide is connected to the lower end of the fixed block, sliders are connected to the upper and lower ends of the limit block, and sliding grooves that fit with the sliders are provided on the upper and lower slides.

[0012] A further preferred scheme: the clamping mechanism includes: a pressing block, a reset plate, a third spring, a fixed rod, a connecting rod, a trapezoidal plate, a limit column, an elastic part, a rear limit plate, a clamping block and a front limit plate, a clamping block is installed in the center of the bottom end of the top plate, a front limit plate is installed at the front end of the center of the clamping block, a rear limit plate is installed at the rear end of the front limit plate, an elastic part is installed on the left sides of the front limit plate and the rear limit plate, a limit column is installed at the bottom ends of the front limit plate and the rear limit plate, a trapezoidal plate is installed at the left rear end of the front limit plate, a fixed rod is installed on the left side of the trapezoidal plate, a connecting rod is installed on the top of the fixed rod, a connecting rod is connected to the left end of the trapezoidal plate, a pressing block is installed at the left end of the connecting rod, a reset plate is installed on the right side of the pressing block, and the third spring is installed on the right end of the reset plate. There are two groups of pressing blocks, reset plates, third springs, fixed rods and connecting rods, which are symmetrically installed on the left and right sides of the rear end of the front limit plate.

[0013] A further preferred solution: the left and right ends of the shell are provided with mounting grooves, and a reset plate and a third spring are installed in the mounting grooves.

[0014] A further preferred solution is that second sliding blocks are installed on the left and right sides of the bottom ends of the rear limit plate and the front limit plate, the second sliding block is "T" shaped, and a second sliding groove that fits with the second sliding block is opened on the limit column.

[0015] Beneficial effects:

[0016] 1. The trapezoidal groove, the trapezoidal limiting strip and the limiting device are provided to prevent the collection box from being displaced. A trapezoidal groove is provided at the upper right end of the shell, and a trapezoidal limiting strip that fits the trapezoidal groove is installed at the left end of the collection box, thereby limiting the front and rear displacement of the collection box. When the trapezoidal limiting strip of the collection box is inserted into the trapezoidal groove, the first spring pushes the limiting block to move rightward along the first sliding groove, thereby clamping the collection box and preventing the collection box from moving left and right.

[0017] 2. The clamping mechanism is provided to achieve the effect of rapid demoulding. After the mold is injection molded, the pressing blocks at both ends are pressed at the same time. The pressing blocks move the connecting rod inward, thereby driving the trapezoidal plate to move inward, so that the rear limit plate and the front limit plate are opened, and the stuck clamping blocks are released. Under the elastic force of the second spring, the ejector plate moves upward, driving the ejector pin to move upward, and the mold is quickly demoulded;

[0018] 3. In summary, this new type of plastic mold protection device can prevent the collection box from being displaced and quickly demould through structures such as trapezoidal grooves, trapezoidal limit strips, limit devices and clamping mechanisms. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0021] Figure 3 The utility model is a schematic diagram of the explosion structure of the limiting device.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the utility model.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the rear limit plate, the clamping block and the second sliding block of the utility model.

[0024] Figure 1-5 In: 1. upper mold; 2. shell; 3. collection box; 4. material guide tube; 5. limiting device; 501. fixed block; 502. upper slide plate; 503. limiting block; 504. lower slide plate; 505. first spring; 506. first slider; 6. first magnetic strip; 7. template; 8. second magnetic strip; 9. guide rod; 10. ejector pin; 11. second spring; 12. clamping mechanism; 1201. pressing block; 1202. reset plate; 1203. third spring; 1204. fixed rod; 1205. connecting rod; 1206. trapezoidal plate; 1207. limiting column; 1208. elastic member; 1209. rear limiting plate; 1210. clamping block; 1211. front limiting plate; 1212. second slider; 13. ejector plate. DETAILED DESCRIPTION

[0025] The following will be combined with the attached embodiment of the utility model Figure 1-Figure 5 , clearly and completely describe the technical solutions in the embodiments of the utility model.

[0026] See also Figure 1-5 In the embodiment of the utility model, a new type of plastic mold protection device includes: a shell 2, an upper mold 1 is installed on the top of the shell 2, a template 7 is installed in the center of the shell 2, a top plate 13 is installed at the bottom of the shell 2, a plurality of ejector pins 10 are installed in the center of the top plate 13, guide rods 9 are installed at the four corners of the top plate 13, a second spring 11 is installed on the outside of the guide rod 9, a clamping mechanism 12 is installed in the center of the bottom end of the top plate 13, a material guide tube 4 is installed in the center of the upper right end of the shell 2, a collection box 3 is installed at the lower end of the material guide tube 4, and a limiting device 5 is installed at the upper right end of the front end of the shell 2.

[0027] In the embodiment of the utility model, a buffer groove is opened in the center of the left and right side walls inside the shell 2, and a first magnetic strip 6 is installed on the top of the buffer groove, and a second magnetic strip 8 is installed on the bottom of the side wall of the template 7, so as to achieve the effect of reducing the impact when the top plate 13 hits the template 7. The first magnetic strip 6 and the second magnetic strip 8 are arranged to repel each other when they are close. When the top plate 13 hits the template 7, the template 7 moves upward, and the distance between the first magnetic strip 6 and the second magnetic strip 8 is reduced, and the mutually repelling forces compete with each other, so that the impact when the top plate 13 hits the template 7 is mitigated.

[0028] In the embodiment of the utility model, a trapezoidal groove is provided at the upper right end of the shell 2, and a trapezoidal limiting strip matching the trapezoidal groove is installed at the left end of the collection box 3, so as to limit the front and rear displacement of the collection box 3.

[0029] In the embodiment of the utility model, the limiting device 5 includes: a fixed block 501, an upper slide plate 502, a limiting block 503, a lower slide plate 504, a first spring 505 and a first sliding block 506. The limiting block 503 is installed at the upper right end of the front end of the shell 2, and the left end of the limiting block 503 is connected to a plurality of first springs 505. The left end of the first spring 505 is connected to the fixed block 501, the upper end of the fixed block 501 is connected to the upper slide plate 502, and the lower end of the fixed block 501 is connected to the lower slide plate 504. The upper and lower ends of the limiting block 503 are connected to the first sliding block 506. The upper and lower slide plates 502 and the lower slide plates 504 are provided with sliding grooves that fit with the sliding blocks. Through the fixed block 501, the effect of supporting the limiting device 5 is achieved; through the upper slide plate 502, the limiting block 503 and the first sliding block 506, the effect of making the limiting block 503 only move horizontally is achieved; through the first spring 505, the effect of keeping the limiting block 503 at a specified position is achieved.

[0030] In the embodiment of the utility model, the clamping mechanism 12 includes: a pressing block 1201, a reset plate 1202, a third spring 1203, a fixing rod 1204, a connecting rod 1205, a trapezoidal plate 1206, a limiting column 1207, an elastic member 1208, a rear limiting plate 1209, a clamping block 1210 and a front limiting plate 1211. A clamping block 1210 is installed at the center of the bottom end of the top plate 13, a front limiting plate 1211 is installed at the central front end of the clamping block 1210, and a rear limiting plate 1209 is installed at the rear end of the front limiting plate 1211. The front limit plate 1211 and the rear limit plate 1209 are provided with an elastic member 1208 on the left side, the front limit plate 1211 and the rear limit plate 1209 are provided with a limit column 1207 at the bottom, the front limit plate 1211 is provided with a trapezoidal plate 1206 on the left rear end, a fixing rod 1204 is provided on the left side of the trapezoidal plate 1206, a connecting rod 1205 is provided on the top of the fixing rod 1204, the left end of the trapezoidal plate 1206 is connected with the connecting rod 1205, a pressing block 1201 is provided on the left end of the connecting rod 1205, and a pressing block 1201 is provided on the right side of the pressing block 1201. The reset plate 1202 has a third spring 1203 installed on the right end of the reset plate 1202. There are two groups of pressing blocks 1201, reset plates 1202, third springs 1203, fixed rods 1204 and connecting rods 1205, which are symmetrically installed on the left and right sides of the rear end of the front limit plate 1211. The pressing block 1201 is used to facilitate pressing. The connecting rod 1205 is used to transmit the pressure from the pressing block 1201. The fixed rod 1204 is used to limit the displacement of the connecting rod 1205. The positioning plate 1209, the block 1210 and the front limiting plate 1211 can achieve the effect of blocking the block 1210, thereby limiting the position of the top plate 13; the reset plate 1202 and the third spring 1203 can achieve the effect of resetting the position of the connecting rod 1205, and the pressing block 1201 is pressed, and the connecting rod 1205 moves to the left, driving the reset plate 1202 to move to the left, and the reset plate 1202 compresses the spring. When the pressing block is released, the reset plate 1202 moves to the left under the elastic force of the spring, driving the connecting rod 1205 to reset. The limiting column 1207 can achieve the effect of supporting the rear limiting plate 1209 and the front limiting plate 1211; the trapezoidal plate 1206 can achieve the effect of separating the rear limiting plate 1209 and the front limiting plate 1211; the elastic member 1208 can achieve the effect of keeping the rear limiting plate 1209 and the front limiting plate 1211 in a closed state.

[0031] In the embodiment of the utility model, the left and right ends of the shell 2 are provided with installation grooves, and the reset plate 1202 and the third spring 1203 are installed in the installation grooves. The installation grooves provide installation positions for the reset plate 1202 and the third spring 1203.

[0032] In the embodiment of the utility model, second sliders 1212 are installed on the left and right sides of the bottom ends of the rear limit plate 1209 and the front limit plate 1211, the second slider 1212 is "T" shaped, and a second slide groove that fits with the second slider 1212 is opened on the limit column 1207, so that the rear limit plate 1209 and the front limit plate 1211 can only produce forward and backward displacement.

[0033] Working principle: When in use, first inject plastic solution into the device through the injection hole of the upper mold 1. When there is too much plastic solution, it will flow into the collection box 3 from the guide tube 4 for recycling, saving materials while keeping the environment around the shell 2 clean and tidy. A trapezoidal groove is provided at the upper right end of the shell 2, and a trapezoidal limit bar that fits the trapezoidal groove is installed at the left end of the collection box 3, thereby limiting the forward and backward displacement of the collection box 3. When the trapezoidal limit bar of the collection box 3 is stuck in the trapezoidal groove, the first spring 505 pushes the limit block 503 to move to the right along the first slide groove, thereby blocking the collection box 3 and preventing the collection box 3 from moving left and right; after the mold is injection-molded, the pressing blocks 1201 at the left and right ends are pressed at the same time, and the pressing blocks 1201 move the connecting rod 1205 inward, thereby driving The trapezoidal plate 1206 moves inward, so that the rear limit plate 1209 and the front limit plate 1211 are opened, and the stuck block 1210 is released. Under the elastic force of the second spring 11, the top plate 13 moves upward, driving the ejector pin 10 to move upward, and the mold is quickly demolded. At the same time, the first magnetic strip 6 and the second magnetic strip 8 are arranged to repel each other when close. When the top plate 13 hits the template 7, the template 7 moves upward, and the distance between the first magnetic strip 6 and the second magnetic strip 8 is reduced. The mutually repelling forces mitigate the impact when the top plate 13 hits the template 7. The ejector rod of the device is not in direct contact with the template 7, which avoids the ejector rod being easily deformed at high temperatures, resulting in the ejector rod being unable to eject the plastic product from the inside of the plastic mold, thereby effectively protecting the plastic mold.

Claims

1. A new type of plastic mold protection device, comprising: The shell (2) is characterized in that: an upper mold (1) is installed at the top of the shell (2), a template (7) is installed in the center of the shell (2), a top plate (13) is installed at the bottom of the shell (2), a plurality of ejector pins (10) are installed in the center of the top plate (13), guide rods (9) are installed at the four corners of the top plate (13), a second spring (11) is installed on the outside of the guide rod (9), a clamping mechanism (12) is installed in the center of the bottom end of the top plate (13), a material guide pipe (4) is installed in the center of the upper right end of the shell (2), a collection box (3) is installed at the lower end of the material guide pipe (4), and a limiting device (5) is installed at the upper right end of the front end of the shell (2).

2. According to claim 1, a new type of plastic mold protection device is characterized in that: A buffer groove is provided in the center of the left and right side walls inside the shell (2), a first magnetic strip (6) is installed at the top of the buffer groove, and a second magnetic strip (8) is installed at the bottom of the side wall of the template (7).

3. A novel plastic mold protection device according to claim 1, characterized in that: The upper right end of the shell (2) is provided with a trapezoidal groove, and the left end of the collection box (3) is provided with a trapezoidal limiting strip that fits with the trapezoidal groove.

4. A novel plastic mold protection device according to claim 1, characterized in that: The limiting device (5) comprises: a fixed block (501), an upper slide plate, a limiting block (503), a lower slide plate, a first spring (505) and a first sliding block (506); the limiting block (503) is installed at the upper right end of the front end of the housing (2); the left end of the limiting block (503) is connected to a plurality of first springs (505); the left end of the first spring (505) is connected to the fixed block (501); the upper end of the fixed block (501) is connected to the upper slide plate; the lower end of the fixed block (501) is connected to the lower slide plate; the upper and lower ends of the limiting block (503) are connected to the first sliding block (506); and the upper and lower slide plates are provided with sliding grooves that fit with the sliding blocks.

5. The novel plastic mold protection device according to claim 1 is characterized in that: The clamping mechanism (12) comprises: a pressing block (1201), a reset plate (1202), a third spring (1203), a fixing rod (1204), a connecting rod (1205), a trapezoidal plate (1206), a limiting column (1207), an elastic member (1208), a rear limiting plate (1209), a clamping block (1210) and a front limiting plate (1211); a clamping block (1210) is installed at the center of the bottom end of the top plate (13); a front limiting plate (1211) is installed at the front end of the center of the clamping block (1210); a rear limiting plate (1209) is installed at the rear end of the front limiting plate (1211); elastic members (1208) are installed on the left sides of the front limiting plate (1211) and the rear limiting plate (1209); and the bottoms of the front limiting plate (1211) and the rear limiting plate (1209) are provided with a plurality of springs. A limiting column (1207) is installed at the end, a trapezoidal plate (1206) is installed at the left rear end of the front limiting plate (1211), a fixing rod (1204) is installed on the left side of the trapezoidal plate (1206), a connecting rod (1205) is installed at the top of the fixing rod (1204), the left end of the trapezoidal plate (1206) is connected to the connecting rod (1205), a pressing block (1201) is installed at the left end of the connecting rod (1205), a reset plate (1202) is installed on the right side of the pressing block (1201), and a third spring (1203) is installed at the right end of the reset plate (1202), and the pressing block (1201), the reset plate (1202), the third spring (1203), the fixing rod (1204) and the connecting rod (1205) are in two groups, which are symmetrically installed on the left and right sides of the rear end of the front limiting plate (1211).

6. A novel plastic mold protection device according to claim 5, characterized in that: The housing (2) is provided with installation grooves at the left and right ends, and a reset plate (1202) and a third spring (1203) are installed in the installation grooves.

7. A novel plastic mold protection device according to claim 5, characterized in that: Second sliding blocks (1212) are installed on the left and right sides of the bottom ends of the rear limiting plate (1209) and the front limiting plate (1211); the second sliding blocks are in a "T" shape, and a second sliding groove that fits with the second sliding blocks is provided on the limiting column (1207).

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