Sand shooting mechanism for core shooter

Abstract

The utility model relates to the technical field of core shooters, in particular to a sand shooting mechanism for a core shooter, which comprises a sand blasting head, a sand shooting mechanism and a sand shooting mechanism, the guide assembly is fixedly installed at the lower end of the sand blasting head, the guide assembly comprises a guide body, a guide plate is rotationally installed in the guide body, and the rotation angle of the guide plate can be adjusted; through the arrangement of the guide assembly, precoated sand output by the core shooter can be eccentric, so that the precoated sand can be obliquely sprayed towards one side with large demand quantity by adjusting the guide plate when facing a large-volume and eccentric part, and the uniform density of the precoated sand of the whole sand mold component is ensured; the screwing part is of a mechanical structure, and the angle of the guide plate can be more stably guaranteed when the screwing part faces impact of precoated sand on the guide plate; the feeding assembly is arranged, liquid raw materials needing to be mixed are mixed at the sand blasting outlet of the core shooter, it is guaranteed that precoated sand is mixed with the liquid raw materials when being sprayed out, and extra stirring is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of core shooting machines, in particular to a sand shooting mechanism for core shooting machines. Background Art

[0002] The core shooting machine (injection molding machine) uses compressed air to evenly shoot the molding sand into the sand box for pre-compaction, and then applies pressure for compaction; Commonly used are vertical parting boxless shooting molding machine and horizontal parting boxless shooting molding machine; the vertical parting boxless shooting molding machine does not use a sand box for molding, and the molding sand is directly shot into the molding chamber with a template. The sand mold has high dimensional accuracy, there are cavities on both sides of the sand box, high productivity, and strict requirements on the quality of the molding sand; the horizontal parting boxless shooting molding machine uses a sand box for molding, and after the sand mold is made, the mold is closed and the box is removed, which is convenient for core placement and has high productivity;

[0003] However, as the structure of parts becomes more and more complex, many parts are not symmetrically designed. Therefore, when the core shooting machine is used for injection, especially for larger parts, long-term injection of coated sand can easily cause the density of the coated sand on the side that requires less sand to be very compact, while the coated sand on the other side (the side that requires more coated sand) is relatively loose.

[0004] Therefore, there is an urgent need for a sand shooting mechanism for a core shooting machine, which can adjust the sand shooting to have a certain eccentricity according to the shape of the parts, so that the coated sand can be output eccentrically. Utility Model Content

[0005] The utility model aims to provide a sand shooting mechanism for a core shooting machine, so as to solve the problem that the core shooting machine mentioned in the background technology cannot eccentrically shoot coated sand.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solution: a sand shooting mechanism for a core shooting machine, comprising:

[0007] Sandblasting head, used for spraying coated sand;

[0008] The guide assembly is fixedly installed at the lower end of the sandblasting head. The guide assembly includes a guide body. A guide plate is rotatably installed inside the guide body. The guide plate can adjust the rotation angle.

[0009] Preferably, the guide body has a circular channel inside, the circular channel is provided with a square hole, and the guide plate is rotatably installed in the square hole.

[0010] Preferably, the guide plate is rotatably connected to the guide body via a rotating shaft, one end of the rotating shaft passes through the guide body and is provided with a fastening component, the fastening component being used to fix the angle of the guide plate.

[0011] Preferably, the tightening component includes a notch nut, the notch nut is threadedly connected to the end of the rotating shaft, the end of the rotating shaft is provided with a thread, the inner side of the rotating shaft thread is provided with a non-smooth rod, the non-smooth rod is slidably installed with a fastening block, the fastening block is detachably connected to the guide body, the fastening block and the guide body cannot rotate when they are connected, and the fastening block and the guide body can rotate when they are separated.

[0012] Preferably, a concave cavity is provided on the inner side of the fastening block, a spring is provided in the concave cavity, the spring is sleeved on the rotating shaft, a concave cavity is provided on the inner side of the notch nut, the inner side of the notch nut contacts the fastening block, and the outer end of the notch nut is threadedly connected to the rotating shaft.

[0013] Preferably, a protrusion is provided on the inner side of the fastening block, and the protrusion of the fastening block is inserted into the gap of the fastening protrusion group, and the fastening protrusion group is fixedly installed on the side of the guide body.

[0014] Preferably, the other end of the rotating shaft passes through the guide body to install a rotating control plate.

[0015] Preferably, the cross section of the guide plate is in the shape of an inverted water drop.

[0016] Preferably, there is a gap between the two ends of the guide plate and the guide body, and the width of the gap is 0.5 mm to 8.0 mm.

[0017] Preferably, the sandblasting head and the guide assembly are connected via a feeding assembly, and the feeding assembly includes a feeding pipe, the aperture of the feeding pipe decreases from the top to the middle, and then increases from the middle to the bottom, and a feeding pipe is connected to the middle of the feeding pipe, and the feeding pipe passes through the inside and outside of the feeding pipe.

[0018] Compared with the prior art, the utility model provides a sand shooting mechanism for a core shooting machine.

[0019] Beneficial effects:

[0020] 1. Through the setting of the guide component, the coated sand output by the core shooting machine can be eccentric. Therefore, when facing large and eccentric parts, the guide plate can be adjusted so that the coated sand can be sprayed toward the side with greater demand, ensuring the uniform density of the coated sand of the entire sand mold component.

[0021] 2. The tightening component is a mechanical structure, which can more stably ensure the angle of the guide plate when facing the impact of the coated sand on the guide plate.

[0022] 3. A feeding component is set up. Since some liquid raw materials (to increase the performance of the coated sand) cannot be mixed with the coated sand too early, they can only be mixed by stirring before sandblasting. Therefore, there is an additional stirring process before sandblasting the coated sand, and it is easy to stir unevenly. This application utilizes the Venturi tube principle to mix the liquid raw materials that need to be mixed at the sandblasting outlet of the core shooting machine, ensuring that the coated sand is mixed with the liquid raw materials when it is sprayed out, and no additional stirring is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the front view of this application;

[0024] Figure 2 This is a schematic diagram of the structure of this application;

[0025] Figure 3 For this application, explosion Figure Ⅰ ;

[0026] Figure 4 For this application, explosion Figure II ;

[0027] Figure 5 for Figure 4 A partial enlarged view of the

[0028] Figure 6 This is a cross-sectional view of this application;

[0029] Figure 7 for Figure 6 A partial enlarged view of the

[0030] Figure 8 Schematic diagram of coated sand shooting for this application.

[0031] In the picture: 1. Sandblasting head,

[0032] 2. Guide assembly, 201. Guide body, 202. Guide plate, 203. Rotating shaft, 2031. Non-smooth rod, 204. Fastening component, 2041. Notch nut, 2042. Fastening block, 2043. Spring, 2044. Fastening convex block group, 205. Rotation control plate,

[0033] 3. Feeding assembly, 301. Feeding pipe, 302. Feeding pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral structure; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0037] It should be noted that, in this article, except for the specific description as shown in the figures, the inner side, outer side, etc. directly mentioned in this article, the "inner side" refers to the direction close to the center of the guide component 2, and the "outer side" refers to the direction away from the center of the guide component 2.

[0038] See also Figure 1-8 The utility model provides a technical solution: a sand shooting mechanism for a core shooting machine, comprising:

[0039] Sandblasting head 1, connected to the core shooting machine, used for spraying coated sand;

[0040] The guide assembly 2 adjusts the ejection direction of the coated sand. The guide assembly 2 is fixedly installed at the lower end of the sandblasting head 1. The guide assembly 2 includes a guide body 201. A guide plate 202 is rotatably installed inside the guide body 201. The ejection direction of the coated sand is changed by adjusting the angle of the guide plate 202. The guide plate 202 can adjust the rotation angle.

[0041] In some embodiments, the guide body 201 has a circular channel inside, and the circular channel is provided with a square hole, in which a square guide plate 202 can be installed, thereby ensuring the stable guiding effect of the guide plate 202 at all locations in the axial direction of the rotating shaft 203, and the guide plate 202 is rotatably installed in the square hole.

[0042] In some embodiments, a guide assembly 2 structure is provided that can fix the angle of the guide plate 202. The guide plate 202 is rotatably connected to the guide body 201 via a rotating shaft 203. One end of the rotating shaft 203 passes through the guide body 201 and is equipped with a fastening component 204. The fastening component 204 is used to fix the angle of the guide plate 202.

[0043] In some embodiments, a mechanical fastening component 204 is provided, and the fastening component 204 of the mechanical structure is more stable. For example, the present application can use a stepper motor to control the guide plate 202, but the guide plate 202 is easily vibrated by the impact of the coated sand, which can easily cause damage to electrical components such as the stepper motor. Therefore, it is more preferred to use a mechanical fastening component 204, the fastening component 204 includes a notch nut 2041, the notch nut 2041 is threadedly connected to the end of the shaft 203, the end of the shaft 203 is provided with a thread, the notch nut 2041 is used to tighten and loosen the fastening block 2042, and the inner side of the thread of the shaft 203 is provided with a non-smooth rod 2031 (referring to a regular hexagonal rod, a regular triangular rod, etc.) The non-smooth rod 2031 is slidably installed with a fastening block 2042. After the fastening block 2042 is slidably installed on the non-smooth rod 2031, it can only move along its axial direction but cannot rotate. Therefore, when the fastening block 2042 is connected to the guide body 201, the fastening block 2042 cannot rotate and the rotating shaft 203 cannot rotate either. Therefore, the position of the guide plate 202 is fixed (the rotating shaft 203 and the guide plate 202 cannot rotate relative to each other). The fastening block 2042 and the guide body 201 are detachably connected. When the fastening block 2042 and the guide body 201 are connected (the notch nut 2041 presses the fastening block 2042 against the guide body 201), the two cannot rotate. When the fastening block 2042 and the guide body 201 are separated, the two can rotate.

[0044] In some embodiments, a more specific notch nut 2041 and a fastening block 2042 are provided. The inner side of the fastening block 2042 is provided with a concave cavity (for accommodating a spring 2043). The spring 2043 is provided in the concave cavity. The setting of the spring 2043 can realize that when the notch nut 2041 does not press the fastening block 2042, the fastening block 2042 can automatically separate from the guide body 201 under the action of the spring 2043, thereby losing the rotation restriction on the guide plate 202. The spring 2043 is sleeved on the rotating shaft 203, and the inner side of the notch nut 2041 is provided with a concave cavity. (used to accommodate the non-smooth rod 2031), the inner side surface of the notch nut 2041 contacts the fastening block 2042, and the outer end of the notch nut 2041 is threadedly connected to the rotating shaft 203. When the notch nut 2041 is tightened, the notch nut 2041 presses the fastening block 2042, and the fastening block 2042 compresses the spring 2043 and is connected to the guide body 201, thereby limiting the rotation of the guide plate 202. When the notch nut 2041 is loosened, the spring 2043 lifts the fastening block 2042, and the fastening block 2042 is separated from the guide body 201, so that the guide plate 202 can be rotated and adjusted again.

[0045] In some embodiments, a structure is provided in which a fastening block 2042 is connected to a guide body 201, wherein a protrusion is provided on the inner side of the fastening block 2042 for inserting into the gap of the fastening protrusion group 2044 to limit the relative rotation between the fastening block 2042 and the guide body 201, wherein the protrusion of the fastening block 2042 is inserted into the gap of the fastening protrusion group 2044, and the fastening protrusion group 2044 is composed of a plurality of protrusions, and there is a gap between adjacent protrusions, and the gap can be inserted into the protrusion of the fastening block 2042, and the fastening protrusion group 2044 can evenly have 3 to 10 groups of gaps (a group of gaps is a gap on the same straight line, and the straight line passes through the axis of the rotating shaft 203, such as Figure 5 As shown: the dotted line at A is a group of gaps), and the fastening protrusion group 2044 is fixedly installed on the side of the guide body 201.

[0046] In some embodiments, the other end of the rotating shaft 203 passes through the guide body 201 to install a rotation control plate 205 . The rotation control plate 205 can be used to operate the guide plate 202 and indicate the rotation angle of the guide plate 202 .

[0047] In some embodiments, the cross-section of the guide plate 202 is an inverted teardrop shape, that is, the upper part of the guide plate 202 (the part close to the sandblasting head 1) is a thicker circular structure, and the lower part of the guide plate 202 is thinner. Such a setting of the guide plate 202 has a certain streamline, which reduces the resistance to the coated sand, and the coated sand has a larger friction force. The thick circular setting of the upper part of the guide plate 202 can also withstand more impact and friction of the coated sand without being damaged.

[0048] In some embodiments, in order to prevent the coated sand from causing the two ends of the guide plate 202 to be stuck inside the guide body 201 and unable to rotate, a gap is provided between the two ends of the guide plate 202 and the guide body 201. The particle size of the coated sand is generally between 0.075 mm and 5.0 mm, so the gap width is 0.5 mm to 8.0 mm. Preferably, the gap width is 1.0 mm to 5.0 mm, and more preferably, the gap width is 2.0 mm to 3.0 mm, which effectively prevents the coated sand from being stuck in the gap between the guide plate 202 and the guide body 201. In some embodiments, the guide plate 202 is axially slidably connected to the rotating shaft 203, and the total gap width between the two ends of the guide plate 202 and the guide body 201 is 3.0 mm to 7.0 mm. The guide plate 202 can slide. When larger sand particles are stuck in the gap between the guide plate 202 and the guide body 201, the guide plate 202 can slide to the other end to allow the larger sand particles to pass through.

[0049] In some embodiments, in order to evenly mix liquid raw materials, such as ethanol, into the coated sand, the sandblasting head 1 is connected to the guide assembly 2 via a feeding assembly 3, and the feeding assembly 3 includes a feeding pipe 301. The aperture of the feeding pipe 301 decreases from the top to the middle, and then increases from the middle to the bottom to form a venturi tube. A feeding pipe 302 is connected to the middle of the feeding pipe 301. The feeding pipe 302 transports the required liquid raw material into the feeding pipe 301 to mix with the coated sand. Moreover, under the action of the venturi tube effect, the feeding pipe 302 can suck the raw material into the feeding pipe 301 without additional power, and the feeding pipe 302 connects the inside and outside of the feeding pipe 301.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sand shooting mechanism for a core shooting machine, characterized in that: include: A sandblasting head (1), used for blasting coated sand; A guide assembly (2), wherein the guide assembly (2) is fixedly mounted on the lower end of the sandblasting head (1), and the guide assembly (2) comprises a guide body (201), a guide plate (202) is rotatably mounted inside the guide body (201), and the guide plate (202) can adjust the rotation angle.

2. A sand shooting mechanism for a core shooting machine according to claim 1, characterized in that: The guide body (201) has a circular channel inside, and the circular channel is provided with a square hole, and the guide plate (202) is rotatably installed in the square hole.

3. A sand shooting mechanism for a core shooting machine according to claim 2, characterized in that: The guide plate (202) is rotatably connected to the guide body (201) via a rotating shaft (203); one end of the rotating shaft (203) passes through the guide body (201) and is then provided with a screwing component (204); the screwing component (204) is used to fix the angle of the guide plate (202).

4. A sand shooting mechanism for a core shooting machine according to claim 3, characterized in that: The tightening component (204) comprises a notch nut (2041), the notch nut (2041) is threadedly connected to the end of the rotating shaft (203), the end of the rotating shaft (203) is provided with a thread, a non-smooth rod (2031) is provided inside the thread of the rotating shaft (203), the non-smooth rod (2031) is slidably mounted with a fastening block (2042), the fastening block (2042) and the guide body (201) are detachably connected, the fastening block (2042) and the guide body (201) cannot rotate when they are connected, and the fastening block (2042) and the guide body (201) can rotate when they are separated.

5. The sand shooting mechanism for a core shooting machine according to claim 4, characterized in that: The inner side surface of the fastening block (2042) is provided with a concave cavity, a spring (2043) is provided in the concave cavity, and the spring (2043) is sleeved on the rotating shaft (203). The inner side surface of the notch nut (2041) is provided with a concave cavity, the inner side surface of the notch nut (2041) is in contact with the fastening block (2042), and the outer end of the notch nut (2041) is threadedly connected to the rotating shaft (203).

6. A sand shooting mechanism for a core shooting machine according to claim 4 or 5, characterized in that: The inner side surface of the fastening block (2042) is provided with a protruding block, and the protruding block of the fastening block (2042) is inserted into the gap of the fastening protruding block group (2044), and the fastening protruding block group (2044) is fixedly mounted on the side surface of the guide body (201).

7. The sand shooting mechanism for a core shooting machine according to claim 3, characterized in that: The other end of the rotating shaft (203) passes through the guide body (201) and is provided with a rotating control plate (205).

8. A sand shooting mechanism for a core shooting machine according to any one of claims 1 to 7, characterized in that: The cross section of the guide plate (202) is in the shape of an inverted water drop.

9. A sand shooting mechanism for a core shooting machine according to claim 8, characterized in that: There is a gap between the two ends of the guide plate (202) and the guide body (201), and the width of the gap is 0.5 mm to 8.0 mm.

10. The sand shooting mechanism for a core shooting machine according to claim 1, characterized in that: The sandblasting head (1) is connected to the guide assembly (2) via a feeding assembly (3), wherein the feeding assembly (3) comprises a feeding pipe (301), wherein the aperture of the feeding pipe (301) decreases from the top to the middle, and then increases from the middle to the bottom, and a feeding pipe (302) is connected to the middle of the feeding pipe (301), and the feeding pipe (302) connects the inside and outside of the feeding pipe (301).

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